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ViewController gets deallocated which leads to crash

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By User



I have a view in my storyboard which I assigned an identifier called "MainView". However if I add its view to the subview, everything that follows produces a crash (e.g. pressing a button)







MainViewController *mvc = [self.storyboard instantiateViewControllerWithIdentifier:@"MainView"];

             [self.view addSubview:mvc.view];







This is the action triggered by the button : (MainViewController.h)







-(IBAction)showUsername:(id)sender{



    [testLabel setText:@"username"];



}







and the crash log :







-[MainViewController performSelector:withObject:withObject:]: message sent to deallocated instance 0x44e0810







I use ARC.


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Comments

  1. Tips For AllFebruary 16, 2012 at 7:54 AM

    Best way to deal with this is using a property. Here's how:

    In your .h file:

    #import "MainViewController.h"

    @interface MyClass : UIViewController

    @property (strong, nonatomic) MainViewController *mvc;

    @end


    In your .m file:

    #import "MyClass.h"

    @implementation MyClass

    @synthesize mvc;

    // Your code here
    - (void)yourMethodHere {
    self.mvc = [self.storyboard instantiateViewControllerWithIdentifier:@"MainView"];
    [self.view addSubview:mvc.view];
    }

    ReplyDelete

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