How to solve this problem with custom transition in iOS?
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3
down vote
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I built a class to implement a circular transition between view controllers. When I hit the button to navigate to the other view controller a circle starts growing from the button until it fills the screen with the new controller. When I dismiss the view controller I expected this circle to shrink down back to the original position. It's also working. The only problem is that when the dismiss is underway the back of the screen while the circle is shrinking is completely black and after the animation is completed the new viewController appears abruptly.
Here are some photos of the effect:
Here's the code of the custom class:
class customTransition: NSObject, UIViewControllerAnimatedTransitioning{
var duration: TimeInterval = 0.5
var startPoint = CGPoint.zero
var circle = UIView()
var circleColor = UIColor.white
enum transitMode: Int {
case presenting, dismissing
}
var transitionMode: transitMode = .presenting
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
guard let to = transitionContext.view(forKey: UITransitionContextViewKey.to) else {return}
guard let from = transitionContext.view(forKey: UITransitionContextViewKey.from) else {return}
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
func getFrameForCircle(rect: CGRect) -> CGRect{
let width = Float(rect.width)
let height = Float(rect.height)
let diameter = CGFloat(sqrtf(width * width + height * height))
let x: CGFloat = rect.midX - (diameter / 2)
let y: CGFloat = rect.midY - (diameter / 2)
return CGRect(x: x, y: y, width: diameter, height: diameter)
}
}
and the implementation...
let circularTransition = customTransition()
the call for the present view controller... I tried to set secondVC.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext but when I set this line it ignores completely the animation transition I don't know why...
`
@objc func handlePresent(sender: UIButton){
let secondVC = nextVC()
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
delegate methods:
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
What am I missing here? Any suggestions?
No storyboard being used, just code.
ios swift uiviewanimationtransition
edited Nov 17 at 22:21
rmaddy
235k27306373
asked Nov 17 at 21:55
Lucas
875
add a comment |
up vote
3
down vote
favorite
I built a class to implement a circular transition between view controllers. When I hit the button to navigate to the other view controller a circle starts growing from the button until it fills the screen with the new controller. When I dismiss the view controller I expected this circle to shrink down back to the original position. It's also working. The only problem is that when the dismiss is underway the back of the screen while the circle is shrinking is completely black and after the animation is completed the new viewController appears abruptly.
Here are some photos of the effect:
Here's the code of the custom class:
class customTransition: NSObject, UIViewControllerAnimatedTransitioning{
var duration: TimeInterval = 0.5
var startPoint = CGPoint.zero
var circle = UIView()
var circleColor = UIColor.white
enum transitMode: Int {
case presenting, dismissing
}
var transitionMode: transitMode = .presenting
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
guard let to = transitionContext.view(forKey: UITransitionContextViewKey.to) else {return}
guard let from = transitionContext.view(forKey: UITransitionContextViewKey.from) else {return}
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
func getFrameForCircle(rect: CGRect) -> CGRect{
let width = Float(rect.width)
let height = Float(rect.height)
let diameter = CGFloat(sqrtf(width * width + height * height))
let x: CGFloat = rect.midX - (diameter / 2)
let y: CGFloat = rect.midY - (diameter / 2)
return CGRect(x: x, y: y, width: diameter, height: diameter)
}
}
and the implementation...
let circularTransition = customTransition()
the call for the present view controller... I tried to set secondVC.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext but when I set this line it ignores completely the animation transition I don't know why...
`
@objc func handlePresent(sender: UIButton){
let secondVC = nextVC()
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
delegate methods:
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
What am I missing here? Any suggestions?
No storyboard being used, just code.
ios swift uiviewanimationtransition
edited Nov 17 at 22:21
rmaddy
235k27306373
asked Nov 17 at 21:55
Lucas
875
I think you're seeing this problem because you're usingpresentand not a navigationController. I recommend trying to use a navigationController to push/pop ViewController and applying your animation when that ViewController is presented. So you would push/pop VC from the NavController without an animation. However, the VC itself would apply your desired animation when appearing either shrinking or growing to/from a circle
– DoesData
Nov 17 at 22:15
You show code that displays the 2nd controller over the 1st. Please also add how you dismiss the 2nd and attempt to transition back to the 1st.
– rmaddy
Nov 17 at 22:21
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I built a class to implement a circular transition between view controllers. When I hit the button to navigate to the other view controller a circle starts growing from the button until it fills the screen with the new controller. When I dismiss the view controller I expected this circle to shrink down back to the original position. It's also working. The only problem is that when the dismiss is underway the back of the screen while the circle is shrinking is completely black and after the animation is completed the new viewController appears abruptly.
Here are some photos of the effect:
Here's the code of the custom class:
class customTransition: NSObject, UIViewControllerAnimatedTransitioning{
var duration: TimeInterval = 0.5
var startPoint = CGPoint.zero
var circle = UIView()
var circleColor = UIColor.white
enum transitMode: Int {
case presenting, dismissing
}
var transitionMode: transitMode = .presenting
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
guard let to = transitionContext.view(forKey: UITransitionContextViewKey.to) else {return}
guard let from = transitionContext.view(forKey: UITransitionContextViewKey.from) else {return}
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
func getFrameForCircle(rect: CGRect) -> CGRect{
let width = Float(rect.width)
let height = Float(rect.height)
let diameter = CGFloat(sqrtf(width * width + height * height))
let x: CGFloat = rect.midX - (diameter / 2)
let y: CGFloat = rect.midY - (diameter / 2)
return CGRect(x: x, y: y, width: diameter, height: diameter)
}
}
and the implementation...
let circularTransition = customTransition()
the call for the present view controller... I tried to set secondVC.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext but when I set this line it ignores completely the animation transition I don't know why...
`
@objc func handlePresent(sender: UIButton){
let secondVC = nextVC()
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
delegate methods:
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
What am I missing here? Any suggestions?
No storyboard being used, just code.
ios swift uiviewanimationtransition
edited Nov 17 at 22:21
rmaddy
235k27306373
asked Nov 17 at 21:55
Lucas
875
I built a class to implement a circular transition between view controllers. When I hit the button to navigate to the other view controller a circle starts growing from the button until it fills the screen with the new controller. When I dismiss the view controller I expected this circle to shrink down back to the original position. It's also working. The only problem is that when the dismiss is underway the back of the screen while the circle is shrinking is completely black and after the animation is completed the new viewController appears abruptly.
Here are some photos of the effect:
Here's the code of the custom class:
class customTransition: NSObject, UIViewControllerAnimatedTransitioning{
var duration: TimeInterval = 0.5
var startPoint = CGPoint.zero
var circle = UIView()
var circleColor = UIColor.white
enum transitMode: Int {
case presenting, dismissing
}
var transitionMode: transitMode = .presenting
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
guard let to = transitionContext.view(forKey: UITransitionContextViewKey.to) else {return}
guard let from = transitionContext.view(forKey: UITransitionContextViewKey.from) else {return}
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
func getFrameForCircle(rect: CGRect) -> CGRect{
let width = Float(rect.width)
let height = Float(rect.height)
let diameter = CGFloat(sqrtf(width * width + height * height))
let x: CGFloat = rect.midX - (diameter / 2)
let y: CGFloat = rect.midY - (diameter / 2)
return CGRect(x: x, y: y, width: diameter, height: diameter)
}
}
and the implementation...
let circularTransition = customTransition()
the call for the present view controller... I tried to set secondVC.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext but when I set this line it ignores completely the animation transition I don't know why...
`
@objc func handlePresent(sender: UIButton){
let secondVC = nextVC()
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
delegate methods:
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
What am I missing here? Any suggestions?
No storyboard being used, just code.
ios swift uiviewanimationtransition
ios swift uiviewanimationtransition
edited Nov 17 at 22:21
rmaddy
235k27306373
asked Nov 17 at 21:55
Lucas
875
edited Nov 17 at 22:21
rmaddy
235k27306373
asked Nov 17 at 21:55
Lucas
875
edited Nov 17 at 22:21
rmaddy
235k27306373
edited Nov 17 at 22:21
rmaddy
235k27306373
edited Nov 17 at 22:21
rmaddy
235k27306373
235k27306373
asked Nov 17 at 21:55
Lucas
875
asked Nov 17 at 21:55
Lucas
875
asked Nov 17 at 21:55
Lucas
875
875
I think you're seeing this problem because you're usingpresentand not a navigationController. I recommend trying to use a navigationController to push/pop ViewController and applying your animation when that ViewController is presented. So you would push/pop VC from the NavController without an animation. However, the VC itself would apply your desired animation when appearing either shrinking or growing to/from a circle
– DoesData
Nov 17 at 22:15
You show code that displays the 2nd controller over the 1st. Please also add how you dismiss the 2nd and attempt to transition back to the 1st.
– rmaddy
Nov 17 at 22:21
add a comment |
I think you're seeing this problem because you're usingpresentand not a navigationController. I recommend trying to use a navigationController to push/pop ViewController and applying your animation when that ViewController is presented. So you would push/pop VC from the NavController without an animation. However, the VC itself would apply your desired animation when appearing either shrinking or growing to/from a circle
– DoesData
Nov 17 at 22:15
You show code that displays the 2nd controller over the 1st. Please also add how you dismiss the 2nd and attempt to transition back to the 1st.
– rmaddy
Nov 17 at 22:21
I think you're seeing this problem because you're using
present and not a navigationController. I recommend trying to use a navigationController to push/pop ViewController and applying your animation when that ViewController is presented. So you would push/pop VC from the NavController without an animation. However, the VC itself would apply your desired animation when appearing either shrinking or growing to/from a circle– DoesData
Nov 17 at 22:15
I think you're seeing this problem because you're using
present and not a navigationController. I recommend trying to use a navigationController to push/pop ViewController and applying your animation when that ViewController is presented. So you would push/pop VC from the NavController without an animation. However, the VC itself would apply your desired animation when appearing either shrinking or growing to/from a circle– DoesData
Nov 17 at 22:15
You show code that displays the 2nd controller over the 1st. Please also add how you dismiss the 2nd and attempt to transition back to the 1st.
– rmaddy
Nov 17 at 22:21
You show code that displays the 2nd controller over the 1st. Please also add how you dismiss the 2nd and attempt to transition back to the 1st.
– rmaddy
Nov 17 at 22:21
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
If you don't use navigationController, it's necessary to use the .custom mode in the presentedviewController.
import UIKit
class TransViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let circularTransition = customTransition()
@IBOutlet var presentButton : UIButton!
@IBAction func handlePresent(sender: UIButton){
if let secondVC = storyboard?.instantiateViewController(withIdentifier: "next"){
secondVC.modalPresentationStyle = .custom
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
}
}
class BackViewController: UIViewController {
@IBAction func dismissMe(sender: UIButton){
self.dismiss(animated: true, completion: nil)
}
}
extension TransViewController: UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
}
If there is no from or to view, we have use the from and to view from containView.
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
var to : UIView!
var from : UIView!
to = transitionContext.view(forKey: UITransitionContextViewKey.to)
if to == nil {to = container}
from = transitionContext.view(forKey: UITransitionContextViewKey.from)
if from == nil {from = container}
The rest is same:
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
answered Nov 18 at 3:13
E.Coms
1,3951412
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
If you don't use navigationController, it's necessary to use the .custom mode in the presentedviewController.
import UIKit
class TransViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let circularTransition = customTransition()
@IBOutlet var presentButton : UIButton!
@IBAction func handlePresent(sender: UIButton){
if let secondVC = storyboard?.instantiateViewController(withIdentifier: "next"){
secondVC.modalPresentationStyle = .custom
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
}
}
class BackViewController: UIViewController {
@IBAction func dismissMe(sender: UIButton){
self.dismiss(animated: true, completion: nil)
}
}
extension TransViewController: UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
}
If there is no from or to view, we have use the from and to view from containView.
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
var to : UIView!
var from : UIView!
to = transitionContext.view(forKey: UITransitionContextViewKey.to)
if to == nil {to = container}
from = transitionContext.view(forKey: UITransitionContextViewKey.from)
if from == nil {from = container}
The rest is same:
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
answered Nov 18 at 3:13
E.Coms
1,3951412
add a comment |
up vote
0
down vote
If you don't use navigationController, it's necessary to use the .custom mode in the presentedviewController.
import UIKit
class TransViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let circularTransition = customTransition()
@IBOutlet var presentButton : UIButton!
@IBAction func handlePresent(sender: UIButton){
if let secondVC = storyboard?.instantiateViewController(withIdentifier: "next"){
secondVC.modalPresentationStyle = .custom
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
}
}
class BackViewController: UIViewController {
@IBAction func dismissMe(sender: UIButton){
self.dismiss(animated: true, completion: nil)
}
}
extension TransViewController: UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
}
If there is no from or to view, we have use the from and to view from containView.
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
var to : UIView!
var from : UIView!
to = transitionContext.view(forKey: UITransitionContextViewKey.to)
if to == nil {to = container}
from = transitionContext.view(forKey: UITransitionContextViewKey.from)
if from == nil {from = container}
The rest is same:
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
answered Nov 18 at 3:13
E.Coms
1,3951412
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If you don't use navigationController, it's necessary to use the .custom mode in the presentedviewController.
import UIKit
class TransViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let circularTransition = customTransition()
@IBOutlet var presentButton : UIButton!
@IBAction func handlePresent(sender: UIButton){
if let secondVC = storyboard?.instantiateViewController(withIdentifier: "next"){
secondVC.modalPresentationStyle = .custom
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
}
}
class BackViewController: UIViewController {
@IBAction func dismissMe(sender: UIButton){
self.dismiss(animated: true, completion: nil)
}
}
extension TransViewController: UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
}
If there is no from or to view, we have use the from and to view from containView.
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
var to : UIView!
var from : UIView!
to = transitionContext.view(forKey: UITransitionContextViewKey.to)
if to == nil {to = container}
from = transitionContext.view(forKey: UITransitionContextViewKey.from)
if from == nil {from = container}
The rest is same:
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
answered Nov 18 at 3:13
E.Coms
1,3951412
If you don't use navigationController, it's necessary to use the .custom mode in the presentedviewController.
import UIKit
class TransViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
let circularTransition = customTransition()
@IBOutlet var presentButton : UIButton!
@IBAction func handlePresent(sender: UIButton){
if let secondVC = storyboard?.instantiateViewController(withIdentifier: "next"){
secondVC.modalPresentationStyle = .custom
secondVC.transitioningDelegate = self
present(secondVC, animated: true, completion: nil)
}
}
}
class BackViewController: UIViewController {
@IBAction func dismissMe(sender: UIButton){
self.dismiss(animated: true, completion: nil)
}
}
extension TransViewController: UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.startPoint = presentButton.center
circularTransition.transitionMode = .presenting
return circularTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
circularTransition.transitionMode = .dismissing
circularTransition.startPoint = presentButton.center
return circularTransition
}
}
If there is no from or to view, we have use the from and to view from containView.
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
var to : UIView!
var from : UIView!
to = transitionContext.view(forKey: UITransitionContextViewKey.to)
if to == nil {to = container}
from = transitionContext.view(forKey: UITransitionContextViewKey.from)
if from == nil {from = container}
The rest is same:
circleColor = to.backgroundColor ?? UIColor.white
if transitionMode == .presenting {
to.translatesAutoresizingMaskIntoConstraints = false
to.center = startPoint
circle = UIView()
circle.backgroundColor = circleColor
circle.frame = getFrameForCircle(rect: to.frame)
circle.layer.cornerRadius = circle.frame.width / 2
circle.transform = CGAffineTransform(scaleX: 0.01, y: 0.01)
circle.alpha = 0
circle.addSubview(to)
to.centerXAnchor.constraint(equalTo: circle.centerXAnchor).isActive = true
to.centerYAnchor.constraint(equalTo: circle.centerYAnchor).isActive = true
to.widthAnchor.constraint(equalToConstant: to.frame.width).isActive = true
to.heightAnchor.constraint(equalToConstant: to.frame.height).isActive = true
container.addSubview(circle)
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = from.center
self.circle.transform = CGAffineTransform.identity
self.circle.alpha = 1
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
} else if transitionMode == .dismissing {
UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.circle.center = self.startPoint
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
self.circle.alpha = 0
}) { (sucess) in
transitionContext.completeTransition(sucess)
}
}
}
answered Nov 18 at 3:13
E.Coms
1,3951412
answered Nov 18 at 3:13
E.Coms
1,3951412
answered Nov 18 at 3:13
E.Coms
1,3951412
answered Nov 18 at 3:13
E.Coms
1,3951412
1,3951412
add a comment |
add a comment |
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I think you're seeing this problem because you're using
presentand not a navigationController. I recommend trying to use a navigationController to push/pop ViewController and applying your animation when that ViewController is presented. So you would push/pop VC from the NavController without an animation. However, the VC itself would apply your desired animation when appearing either shrinking or growing to/from a circle– DoesData
Nov 17 at 22:15
You show code that displays the 2nd controller over the 1st. Please also add how you dismiss the 2nd and attempt to transition back to the 1st.
– rmaddy
Nov 17 at 22:21