EXC_BAD_ACCESS code 2 on UIAlertView in iOS6

Question

I\'m trying to figure out why im getting this crash in my app.

It works perfectly fine in Xcode 4.4 running in the simulator with ios5.1, but when i switch into xcod

Answer 1

It's happened with me, even in 2014. The problem is want to use an object already released.

What I did wrong:

//class B with UIAletViewDelegate

-(void) showAlert{
 UIAlertView * alert = [[UIAlertView alloc] initWithTitle bla bla...];
 [alert show];
}


//class A
viewDidLoad{
 MyClassB *B = [[B alloc] init];
 [B showAlert];
}

What is the right way:

//Class A
@implementation A{
    ClassB *B;
}

 viewDidLoad{
     B = [[B alloc] init];
     [B showAlert];
 }