UIButton - crash on didReceiveMemoryWarning

[edowling]

Adding an event handler to a UIButton that pushes a view controller onto the current navigation controller causes a crashes in [super didReceiveMemoryWarning];

The offending code is:

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setFrame:CGRectMake(194, 4, 126, 70)];
[button setBackgroundColor:[UIColor clearColor]];
[button addEventHandler:(BKSenderBlock)^ {

   AViewController *viewController = [[AViewController alloc] initWithNibName:@"AViewController" bundle:nil]
   [self.navigationController pushViewController:viewController animated:YES];

 } forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];

Countless hours of debugging and on-device and simulator memory warnings have pinpointed the [button addEventHandler] to be the culprit.

Running the block in the main thread using GCD does not solve the crash.

[zwaldowski]

Thanks for the report. It'll be looked into shortly.

[zwaldowski]

I'm unable to reproduce it. What SDK/OS version is this on? Where (code-wise) is the button being initialized? Not only should -addEventHandler: not being getting called on -didReceiveMemoryWarning, but -addEventHandler: doesn't get called when the button is tapped anyway.

[a2]

It seems you're passing a BKBlock but typecasting it as a BKSenderBlock.

Try it this way:

[button addEventHandler: ^(id sender) {

   AViewController *viewController = [[AViewController alloc] initWithNibName:@"AViewController" bundle:nil]
   [self.navigationController pushViewController:viewController animated:YES];

 } forControlEvents:UIControlEventTouchUpInside];

[edowling]

Thanks for that! Sorry for wasting your time :)

[a2]

No worries! Glad I could have helped!