NSTableView not updating on initial loading
0
I have an NSView with a NSTableView called personTableView. In the ViewController class, I have the following code:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
personTableView.delegate = self
personTableView.dataSource = self
personTableView.reloadData()
}
and have extended the class to with NSTableViewDelegate and NSTableViewDataSource
However, when the view appears, the table shows the following (there are only 2 entries that the table should display):
On my window, I have a button which invokes the following action:
@IBAction func refreshButton(_ sender: NSButton) {
let result = CoreDataHandler.fetchCount()
print("Row Count:(result)")
personTableView.reloadData()
codeTableView.reloadData()
}
which when pressed, populates my TableView. I don't understand why it won't load automatically?
I have also tried putting the personTableView.reloadData() into viewWillAppear and viewDidAppear to no avail.
Update:
This is the fetchCount():
static func fetchCount() -> Int {
let context = getContext()
do {
let count = try context.count(for: Person.fetchRequest())
NSLog("Count from fetchCount: %d", count)
return count
} catch {
return 0
}
}
For information, this is the Table Delegate and DataSource functions:
extension ViewController: NSTableViewDataSource {
func numberOfRows(in tableView: NSTableView) -> Int {
if tableView == self.personTableView {
let result = CoreDataHandler.fetchCount()
//NSLog("Rows in Ext: %@",result)
return result
}
if tableView == self.codeTableView {
let row = personTableView.selectedRow
if row > -1 {
let person = CoreDataHandler.fetchPerson()?[row]
print("Person= (String(describing: person?.first))")
//let result = CoreDataHandler.fetchCodes(person: person!)
let result = person?.codes
//print("Person from result: (String(describing: result?.first.whosAccount?.ibAccount))")
let count = result!.count
print("Rows in Codes from viewController dataSource: (count)")
return count
} else {
return 0
}
}
return 0
}
}
extension ViewController: NSTableViewDelegate {
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any? {
if tableView == self.personTableView {
guard let person = CoreDataHandler.fetchPerson()?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (person.first ?? nil) ?? ""
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = (person.last ?? nil) ?? ""
} else {
cell.textField?.stringValue = (person.ibAccount ?? nil) ?? ""
}
return cell
} else {
return nil
}
}
if tableView == self.codeTableView {
let personRow = personTableView.selectedRow
if personRow > -1 {
let person = CoreDataHandler.fetchPerson()?[personRow]
guard let code = CoreDataHandler.fetchCodes(person: person!)?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (String(code.number) )
//cell.textField?.stringValue = person?.codes?.allObjects[row] as! String
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = code.code!
} else if tableColumn == tableView.tableColumns[2] {
cell.textField?.stringValue = (code.whosAccount?.ibAccount ?? "")
}
return cell
} else {
return nil
}
}
}
return nil
}
}
swift nstableview
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
|
show 2 more comments
0
I have an NSView with a NSTableView called personTableView. In the ViewController class, I have the following code:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
personTableView.delegate = self
personTableView.dataSource = self
personTableView.reloadData()
}
and have extended the class to with NSTableViewDelegate and NSTableViewDataSource
However, when the view appears, the table shows the following (there are only 2 entries that the table should display):
On my window, I have a button which invokes the following action:
@IBAction func refreshButton(_ sender: NSButton) {
let result = CoreDataHandler.fetchCount()
print("Row Count:(result)")
personTableView.reloadData()
codeTableView.reloadData()
}
which when pressed, populates my TableView. I don't understand why it won't load automatically?
I have also tried putting the personTableView.reloadData() into viewWillAppear and viewDidAppear to no avail.
Update:
This is the fetchCount():
static func fetchCount() -> Int {
let context = getContext()
do {
let count = try context.count(for: Person.fetchRequest())
NSLog("Count from fetchCount: %d", count)
return count
} catch {
return 0
}
}
For information, this is the Table Delegate and DataSource functions:
extension ViewController: NSTableViewDataSource {
func numberOfRows(in tableView: NSTableView) -> Int {
if tableView == self.personTableView {
let result = CoreDataHandler.fetchCount()
//NSLog("Rows in Ext: %@",result)
return result
}
if tableView == self.codeTableView {
let row = personTableView.selectedRow
if row > -1 {
let person = CoreDataHandler.fetchPerson()?[row]
print("Person= (String(describing: person?.first))")
//let result = CoreDataHandler.fetchCodes(person: person!)
let result = person?.codes
//print("Person from result: (String(describing: result?.first.whosAccount?.ibAccount))")
let count = result!.count
print("Rows in Codes from viewController dataSource: (count)")
return count
} else {
return 0
}
}
return 0
}
}
extension ViewController: NSTableViewDelegate {
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any? {
if tableView == self.personTableView {
guard let person = CoreDataHandler.fetchPerson()?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (person.first ?? nil) ?? ""
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = (person.last ?? nil) ?? ""
} else {
cell.textField?.stringValue = (person.ibAccount ?? nil) ?? ""
}
return cell
} else {
return nil
}
}
if tableView == self.codeTableView {
let personRow = personTableView.selectedRow
if personRow > -1 {
let person = CoreDataHandler.fetchPerson()?[personRow]
guard let code = CoreDataHandler.fetchCodes(person: person!)?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (String(code.number) )
//cell.textField?.stringValue = person?.codes?.allObjects[row] as! String
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = code.code!
} else if tableColumn == tableView.tableColumns[2] {
cell.textField?.stringValue = (code.whosAccount?.ibAccount ?? "")
}
return cell
} else {
return nil
}
}
}
return nil
}
}
swift nstableview
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
Can you share whatCoreDataHandler.fetchCount()does?
– DionizB
Nov 21 '18 at 16:52
Don't fetch anything innumberOfRowsand inobjectValueFor. Don't do that. It's unnecessarily expensive and inefficient. Fetch the stuff once and reload the table view or useNSFetchResultsControllerand Cocoa Bindings. The latter reduces your code by 2/3.
– vadian
Nov 21 '18 at 17:40
@vadian: Thanks for the suggestion. I am fairly new to this. If I fetch that data once and have nothing innumberof RowsandobjectValueFor, how do the tables get updated?
– pdoak
Nov 21 '18 at 17:45
Fetch the data into a data source arrayvar people = [Person](). Returnpeople.countinnumberOfRowsandpeople[row]inobjectValueFor. And replace(person.first ?? nil) ?? ""withperson.first ?? "". The second nil-coalescing operator is redundant.
– vadian
Nov 21 '18 at 17:46
@vadian: Okay but how do I return thearray[row]inobjectValueForas I thought I had to return each column separately
– pdoak
Nov 21 '18 at 17:50
|
show 2 more comments
0
0
0
I have an NSView with a NSTableView called personTableView. In the ViewController class, I have the following code:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
personTableView.delegate = self
personTableView.dataSource = self
personTableView.reloadData()
}
and have extended the class to with NSTableViewDelegate and NSTableViewDataSource
However, when the view appears, the table shows the following (there are only 2 entries that the table should display):
On my window, I have a button which invokes the following action:
@IBAction func refreshButton(_ sender: NSButton) {
let result = CoreDataHandler.fetchCount()
print("Row Count:(result)")
personTableView.reloadData()
codeTableView.reloadData()
}
which when pressed, populates my TableView. I don't understand why it won't load automatically?
I have also tried putting the personTableView.reloadData() into viewWillAppear and viewDidAppear to no avail.
Update:
This is the fetchCount():
static func fetchCount() -> Int {
let context = getContext()
do {
let count = try context.count(for: Person.fetchRequest())
NSLog("Count from fetchCount: %d", count)
return count
} catch {
return 0
}
}
For information, this is the Table Delegate and DataSource functions:
extension ViewController: NSTableViewDataSource {
func numberOfRows(in tableView: NSTableView) -> Int {
if tableView == self.personTableView {
let result = CoreDataHandler.fetchCount()
//NSLog("Rows in Ext: %@",result)
return result
}
if tableView == self.codeTableView {
let row = personTableView.selectedRow
if row > -1 {
let person = CoreDataHandler.fetchPerson()?[row]
print("Person= (String(describing: person?.first))")
//let result = CoreDataHandler.fetchCodes(person: person!)
let result = person?.codes
//print("Person from result: (String(describing: result?.first.whosAccount?.ibAccount))")
let count = result!.count
print("Rows in Codes from viewController dataSource: (count)")
return count
} else {
return 0
}
}
return 0
}
}
extension ViewController: NSTableViewDelegate {
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any? {
if tableView == self.personTableView {
guard let person = CoreDataHandler.fetchPerson()?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (person.first ?? nil) ?? ""
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = (person.last ?? nil) ?? ""
} else {
cell.textField?.stringValue = (person.ibAccount ?? nil) ?? ""
}
return cell
} else {
return nil
}
}
if tableView == self.codeTableView {
let personRow = personTableView.selectedRow
if personRow > -1 {
let person = CoreDataHandler.fetchPerson()?[personRow]
guard let code = CoreDataHandler.fetchCodes(person: person!)?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (String(code.number) )
//cell.textField?.stringValue = person?.codes?.allObjects[row] as! String
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = code.code!
} else if tableColumn == tableView.tableColumns[2] {
cell.textField?.stringValue = (code.whosAccount?.ibAccount ?? "")
}
return cell
} else {
return nil
}
}
}
return nil
}
}
swift nstableview
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
I have an NSView with a NSTableView called personTableView. In the ViewController class, I have the following code:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
personTableView.delegate = self
personTableView.dataSource = self
personTableView.reloadData()
}
and have extended the class to with NSTableViewDelegate and NSTableViewDataSource
However, when the view appears, the table shows the following (there are only 2 entries that the table should display):
On my window, I have a button which invokes the following action:
@IBAction func refreshButton(_ sender: NSButton) {
let result = CoreDataHandler.fetchCount()
print("Row Count:(result)")
personTableView.reloadData()
codeTableView.reloadData()
}
which when pressed, populates my TableView. I don't understand why it won't load automatically?
I have also tried putting the personTableView.reloadData() into viewWillAppear and viewDidAppear to no avail.
Update:
This is the fetchCount():
static func fetchCount() -> Int {
let context = getContext()
do {
let count = try context.count(for: Person.fetchRequest())
NSLog("Count from fetchCount: %d", count)
return count
} catch {
return 0
}
}
For information, this is the Table Delegate and DataSource functions:
extension ViewController: NSTableViewDataSource {
func numberOfRows(in tableView: NSTableView) -> Int {
if tableView == self.personTableView {
let result = CoreDataHandler.fetchCount()
//NSLog("Rows in Ext: %@",result)
return result
}
if tableView == self.codeTableView {
let row = personTableView.selectedRow
if row > -1 {
let person = CoreDataHandler.fetchPerson()?[row]
print("Person= (String(describing: person?.first))")
//let result = CoreDataHandler.fetchCodes(person: person!)
let result = person?.codes
//print("Person from result: (String(describing: result?.first.whosAccount?.ibAccount))")
let count = result!.count
print("Rows in Codes from viewController dataSource: (count)")
return count
} else {
return 0
}
}
return 0
}
}
extension ViewController: NSTableViewDelegate {
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any? {
if tableView == self.personTableView {
guard let person = CoreDataHandler.fetchPerson()?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (person.first ?? nil) ?? ""
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = (person.last ?? nil) ?? ""
} else {
cell.textField?.stringValue = (person.ibAccount ?? nil) ?? ""
}
return cell
} else {
return nil
}
}
if tableView == self.codeTableView {
let personRow = personTableView.selectedRow
if personRow > -1 {
let person = CoreDataHandler.fetchPerson()?[personRow]
guard let code = CoreDataHandler.fetchCodes(person: person!)?[row] else {
return nil
}
if let cell = tableView.makeView(withIdentifier: (tableColumn!.identifier), owner: nil) as? NSTableCellView {
if tableColumn == tableView.tableColumns[0] {
cell.textField?.stringValue = (String(code.number) )
//cell.textField?.stringValue = person?.codes?.allObjects[row] as! String
} else if tableColumn == tableView.tableColumns[1] {
cell.textField?.stringValue = code.code!
} else if tableColumn == tableView.tableColumns[2] {
cell.textField?.stringValue = (code.whosAccount?.ibAccount ?? "")
}
return cell
} else {
return nil
}
}
}
return nil
}
}
swift nstableview
swift nstableview
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
edited Nov 22 '18 at 9:26
wvteijlingen
8,52612544
8,52612544
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
asked Nov 21 '18 at 16:27
pdoakpdoak
339211
339211
Can you share whatCoreDataHandler.fetchCount()does?
– DionizB
Nov 21 '18 at 16:52
Don't fetch anything innumberOfRowsand inobjectValueFor. Don't do that. It's unnecessarily expensive and inefficient. Fetch the stuff once and reload the table view or useNSFetchResultsControllerand Cocoa Bindings. The latter reduces your code by 2/3.
– vadian
Nov 21 '18 at 17:40
@vadian: Thanks for the suggestion. I am fairly new to this. If I fetch that data once and have nothing innumberof RowsandobjectValueFor, how do the tables get updated?
– pdoak
Nov 21 '18 at 17:45
Fetch the data into a data source arrayvar people = [Person](). Returnpeople.countinnumberOfRowsandpeople[row]inobjectValueFor. And replace(person.first ?? nil) ?? ""withperson.first ?? "". The second nil-coalescing operator is redundant.
– vadian
Nov 21 '18 at 17:46
@vadian: Okay but how do I return thearray[row]inobjectValueForas I thought I had to return each column separately
– pdoak
Nov 21 '18 at 17:50
|
show 2 more comments
Can you share whatCoreDataHandler.fetchCount()does?
– DionizB
Nov 21 '18 at 16:52
Don't fetch anything innumberOfRowsand inobjectValueFor. Don't do that. It's unnecessarily expensive and inefficient. Fetch the stuff once and reload the table view or useNSFetchResultsControllerand Cocoa Bindings. The latter reduces your code by 2/3.
– vadian
Nov 21 '18 at 17:40
@vadian: Thanks for the suggestion. I am fairly new to this. If I fetch that data once and have nothing innumberof RowsandobjectValueFor, how do the tables get updated?
– pdoak
Nov 21 '18 at 17:45
Fetch the data into a data source arrayvar people = [Person](). Returnpeople.countinnumberOfRowsandpeople[row]inobjectValueFor. And replace(person.first ?? nil) ?? ""withperson.first ?? "". The second nil-coalescing operator is redundant.
– vadian
Nov 21 '18 at 17:46
@vadian: Okay but how do I return thearray[row]inobjectValueForas I thought I had to return each column separately
– pdoak
Nov 21 '18 at 17:50
Can you share what
CoreDataHandler.fetchCount() does?– DionizB
Nov 21 '18 at 16:52
Can you share what
CoreDataHandler.fetchCount() does?– DionizB
Nov 21 '18 at 16:52
Don't fetch anything in
numberOfRows and in objectValueFor. Don't do that. It's unnecessarily expensive and inefficient. Fetch the stuff once and reload the table view or use NSFetchResultsController and Cocoa Bindings. The latter reduces your code by 2/3.– vadian
Nov 21 '18 at 17:40
Don't fetch anything in
numberOfRows and in objectValueFor. Don't do that. It's unnecessarily expensive and inefficient. Fetch the stuff once and reload the table view or use NSFetchResultsController and Cocoa Bindings. The latter reduces your code by 2/3.– vadian
Nov 21 '18 at 17:40
@vadian: Thanks for the suggestion. I am fairly new to this. If I fetch that data once and have nothing in
numberof Rows and objectValueFor, how do the tables get updated?– pdoak
Nov 21 '18 at 17:45
@vadian: Thanks for the suggestion. I am fairly new to this. If I fetch that data once and have nothing in
numberof Rows and objectValueFor, how do the tables get updated?– pdoak
Nov 21 '18 at 17:45
Fetch the data into a data source array
var people = [Person](). Return people.count in numberOfRows and people[row] in objectValueFor. And replace (person.first ?? nil) ?? "" with person.first ?? "". The second nil-coalescing operator is redundant.– vadian
Nov 21 '18 at 17:46
Fetch the data into a data source array
var people = [Person](). Return people.count in numberOfRows and people[row] in objectValueFor. And replace (person.first ?? nil) ?? "" with person.first ?? "". The second nil-coalescing operator is redundant.– vadian
Nov 21 '18 at 17:46
@vadian: Okay but how do I return the
array[row] in objectValueFor as I thought I had to return each column separately– pdoak
Nov 21 '18 at 17:50
@vadian: Okay but how do I return the
array[row] in objectValueFor as I thought I had to return each column separately– pdoak
Nov 21 '18 at 17:50
|
show 2 more comments
2 Answers
2
active
oldest
votes
0
You've mixed up tableView(_:objectValueFor:row:) of NSTableViewDataSource and tableView(_:viewFor:row:) of NSTableViewDelegate. Replace
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any?
by
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView?
or return strings from tableView(_:objectValueFor:row:)
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
That works. Thank you. I don't understand why one works and the others doesn't. Is there a quick explanation?
– pdoak
Nov 21 '18 at 17:40
See tableView(:objectValueFor:row:) and tableView(:viewFor:row:).tableView(_:objectValueFor:row:)returns a value object (string, number, image) andtableView(_:viewFor:row:)returns a view.NSTableViewcan't turn a view into a string.
– Willeke
Nov 21 '18 at 18:01
Thank you, that makes sense.
– pdoak
Nov 21 '18 at 18:02
add a comment |
0
It seems like the table view is being populated based on data stored in the result variable. Try making the call to let result = CoreDataHandler.fetchCount() in viewDidLoad
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
Thanks for the suggestion but it did not solve the problem.
– pdoak
Nov 21 '18 at 16:48
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
You've mixed up tableView(_:objectValueFor:row:) of NSTableViewDataSource and tableView(_:viewFor:row:) of NSTableViewDelegate. Replace
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any?
by
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView?
or return strings from tableView(_:objectValueFor:row:)
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
That works. Thank you. I don't understand why one works and the others doesn't. Is there a quick explanation?
– pdoak
Nov 21 '18 at 17:40
See tableView(:objectValueFor:row:) and tableView(:viewFor:row:).tableView(_:objectValueFor:row:)returns a value object (string, number, image) andtableView(_:viewFor:row:)returns a view.NSTableViewcan't turn a view into a string.
– Willeke
Nov 21 '18 at 18:01
Thank you, that makes sense.
– pdoak
Nov 21 '18 at 18:02
add a comment |
0
You've mixed up tableView(_:objectValueFor:row:) of NSTableViewDataSource and tableView(_:viewFor:row:) of NSTableViewDelegate. Replace
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any?
by
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView?
or return strings from tableView(_:objectValueFor:row:)
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
That works. Thank you. I don't understand why one works and the others doesn't. Is there a quick explanation?
– pdoak
Nov 21 '18 at 17:40
See tableView(:objectValueFor:row:) and tableView(:viewFor:row:).tableView(_:objectValueFor:row:)returns a value object (string, number, image) andtableView(_:viewFor:row:)returns a view.NSTableViewcan't turn a view into a string.
– Willeke
Nov 21 '18 at 18:01
Thank you, that makes sense.
– pdoak
Nov 21 '18 at 18:02
add a comment |
0
0
0
You've mixed up tableView(_:objectValueFor:row:) of NSTableViewDataSource and tableView(_:viewFor:row:) of NSTableViewDelegate. Replace
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any?
by
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView?
or return strings from tableView(_:objectValueFor:row:)
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
You've mixed up tableView(_:objectValueFor:row:) of NSTableViewDataSource and tableView(_:viewFor:row:) of NSTableViewDelegate. Replace
func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any?
by
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView?
or return strings from tableView(_:objectValueFor:row:)
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
answered Nov 21 '18 at 17:32
WillekeWilleke
7,75121024
7,75121024
That works. Thank you. I don't understand why one works and the others doesn't. Is there a quick explanation?
– pdoak
Nov 21 '18 at 17:40
See tableView(:objectValueFor:row:) and tableView(:viewFor:row:).tableView(_:objectValueFor:row:)returns a value object (string, number, image) andtableView(_:viewFor:row:)returns a view.NSTableViewcan't turn a view into a string.
– Willeke
Nov 21 '18 at 18:01
Thank you, that makes sense.
– pdoak
Nov 21 '18 at 18:02
add a comment |
That works. Thank you. I don't understand why one works and the others doesn't. Is there a quick explanation?
– pdoak
Nov 21 '18 at 17:40
See tableView(:objectValueFor:row:) and tableView(:viewFor:row:).tableView(_:objectValueFor:row:)returns a value object (string, number, image) andtableView(_:viewFor:row:)returns a view.NSTableViewcan't turn a view into a string.
– Willeke
Nov 21 '18 at 18:01
Thank you, that makes sense.
– pdoak
Nov 21 '18 at 18:02
That works. Thank you. I don't understand why one works and the others doesn't. Is there a quick explanation?
– pdoak
Nov 21 '18 at 17:40
That works. Thank you. I don't understand why one works and the others doesn't. Is there a quick explanation?
– pdoak
Nov 21 '18 at 17:40
See tableView(:objectValueFor:row:) and tableView(:viewFor:row:).
tableView(_:objectValueFor:row:) returns a value object (string, number, image) and tableView(_:viewFor:row:) returns a view. NSTableView can't turn a view into a string.– Willeke
Nov 21 '18 at 18:01
See tableView(:objectValueFor:row:) and tableView(:viewFor:row:).
tableView(_:objectValueFor:row:) returns a value object (string, number, image) and tableView(_:viewFor:row:) returns a view. NSTableView can't turn a view into a string.– Willeke
Nov 21 '18 at 18:01
Thank you, that makes sense.
– pdoak
Nov 21 '18 at 18:02
Thank you, that makes sense.
– pdoak
Nov 21 '18 at 18:02
add a comment |
0
It seems like the table view is being populated based on data stored in the result variable. Try making the call to let result = CoreDataHandler.fetchCount() in viewDidLoad
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
Thanks for the suggestion but it did not solve the problem.
– pdoak
Nov 21 '18 at 16:48
add a comment |
0
It seems like the table view is being populated based on data stored in the result variable. Try making the call to let result = CoreDataHandler.fetchCount() in viewDidLoad
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
Thanks for the suggestion but it did not solve the problem.
– pdoak
Nov 21 '18 at 16:48
add a comment |
0
0
0
It seems like the table view is being populated based on data stored in the result variable. Try making the call to let result = CoreDataHandler.fetchCount() in viewDidLoad
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
It seems like the table view is being populated based on data stored in the result variable. Try making the call to let result = CoreDataHandler.fetchCount() in viewDidLoad
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
answered Nov 21 '18 at 16:44
Key HoffmanKey Hoffman
94
94
Thanks for the suggestion but it did not solve the problem.
– pdoak
Nov 21 '18 at 16:48
add a comment |
Thanks for the suggestion but it did not solve the problem.
– pdoak
Nov 21 '18 at 16:48
Thanks for the suggestion but it did not solve the problem.
– pdoak
Nov 21 '18 at 16:48
Thanks for the suggestion but it did not solve the problem.
– pdoak
Nov 21 '18 at 16:48
add a comment |
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Can you share what
CoreDataHandler.fetchCount()does?– DionizB
Nov 21 '18 at 16:52
Don't fetch anything in
numberOfRowsand inobjectValueFor. Don't do that. It's unnecessarily expensive and inefficient. Fetch the stuff once and reload the table view or useNSFetchResultsControllerand Cocoa Bindings. The latter reduces your code by 2/3.– vadian
Nov 21 '18 at 17:40
@vadian: Thanks for the suggestion. I am fairly new to this. If I fetch that data once and have nothing in
numberof RowsandobjectValueFor, how do the tables get updated?– pdoak
Nov 21 '18 at 17:45
Fetch the data into a data source array
var people = [Person](). Returnpeople.countinnumberOfRowsandpeople[row]inobjectValueFor. And replace(person.first ?? nil) ?? ""withperson.first ?? "". The second nil-coalescing operator is redundant.– vadian
Nov 21 '18 at 17:46
@vadian: Okay but how do I return the
array[row]inobjectValueForas I thought I had to return each column separately– pdoak
Nov 21 '18 at 17:50