Why my app crashed when called a NSString variable declared globally?











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I declared a string variable to be used in another class in the same file, however when I try to display an alert with the string, it crashed.



NSString *str1;

@implementation someClass
-(void) someMethod{
str1 = something; //update the str1 value from .plist
//Alert with str1 in here displayed with no issue
}
@end


Then after the value of str1 is being updated, another class retrieved it as below, here, it crashed



%hook someInterestingClass

%new
-(void) someMethod:(NSNotification*)notification

UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Sample Title"
message:str1
delegate:nil
cancelButtonTitle:@"Sample Title"
otherButtonTitles:nil];
[alert show];
[alert release];
}
%end


However if I globally declare a float like so and display an alert (same with above), it display perfectly fine. Why is NSString so special?



float someValue;


EDIT:
I realized it only crashed if only I try to access it from under %new, but not under %hook










share|improve this question




























    up vote
    -2
    down vote

    favorite












    I declared a string variable to be used in another class in the same file, however when I try to display an alert with the string, it crashed.



    NSString *str1;

    @implementation someClass
    -(void) someMethod{
    str1 = something; //update the str1 value from .plist
    //Alert with str1 in here displayed with no issue
    }
    @end


    Then after the value of str1 is being updated, another class retrieved it as below, here, it crashed



    %hook someInterestingClass

    %new
    -(void) someMethod:(NSNotification*)notification

    UIAlertView *alert = [[UIAlertView alloc]
    initWithTitle:@"Sample Title"
    message:str1
    delegate:nil
    cancelButtonTitle:@"Sample Title"
    otherButtonTitles:nil];
    [alert show];
    [alert release];
    }
    %end


    However if I globally declare a float like so and display an alert (same with above), it display perfectly fine. Why is NSString so special?



    float someValue;


    EDIT:
    I realized it only crashed if only I try to access it from under %new, but not under %hook










    share|improve this question


























      up vote
      -2
      down vote

      favorite









      up vote
      -2
      down vote

      favorite











      I declared a string variable to be used in another class in the same file, however when I try to display an alert with the string, it crashed.



      NSString *str1;

      @implementation someClass
      -(void) someMethod{
      str1 = something; //update the str1 value from .plist
      //Alert with str1 in here displayed with no issue
      }
      @end


      Then after the value of str1 is being updated, another class retrieved it as below, here, it crashed



      %hook someInterestingClass

      %new
      -(void) someMethod:(NSNotification*)notification

      UIAlertView *alert = [[UIAlertView alloc]
      initWithTitle:@"Sample Title"
      message:str1
      delegate:nil
      cancelButtonTitle:@"Sample Title"
      otherButtonTitles:nil];
      [alert show];
      [alert release];
      }
      %end


      However if I globally declare a float like so and display an alert (same with above), it display perfectly fine. Why is NSString so special?



      float someValue;


      EDIT:
      I realized it only crashed if only I try to access it from under %new, but not under %hook










      share|improve this question















      I declared a string variable to be used in another class in the same file, however when I try to display an alert with the string, it crashed.



      NSString *str1;

      @implementation someClass
      -(void) someMethod{
      str1 = something; //update the str1 value from .plist
      //Alert with str1 in here displayed with no issue
      }
      @end


      Then after the value of str1 is being updated, another class retrieved it as below, here, it crashed



      %hook someInterestingClass

      %new
      -(void) someMethod:(NSNotification*)notification

      UIAlertView *alert = [[UIAlertView alloc]
      initWithTitle:@"Sample Title"
      message:str1
      delegate:nil
      cancelButtonTitle:@"Sample Title"
      otherButtonTitles:nil];
      [alert show];
      [alert release];
      }
      %end


      However if I globally declare a float like so and display an alert (same with above), it display perfectly fine. Why is NSString so special?



      float someValue;


      EDIT:
      I realized it only crashed if only I try to access it from under %new, but not under %hook







      objective-c jailbreak






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      edited Nov 17 at 10:38

























      asked Nov 17 at 10:27









      Gregor Isack

      440312




      440312





























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