Question

On the tap of a button I am loading in a UIViewController from my storyboard using the following code…

InfoViewController *dst = [self.storyboard instantiateViewControllerWithIdentifier:@"InfoViewIdentifier"];
[self.view insertSubview:dst.view atIndex:0];
dst.view.frame = CGRectMake(0, 480, 320, 480);

[UIView beginAnimations: @"infoAnimation" context: nil];
[UIView animateWithDuration: 1.0f animations: ^{dst.view.frame = CGRectMake(0, 0, 320, 480);}];
[UIView commitAnimations];

Everything loads fine. The resulting view has a few buttons on it with simple actions (dismissing the view, opening URLs in safari, etc.) and as soon as I tap any of them, I receive an exception. The odd thing is, it might throw one of 2 exceptions…

• Thread 1: EXC_BAD_ACCESS (code=1, address=…) – shown with the app still running in an exception break point.
• Missing proxy for identifier UpstreamPlaceholder-2 – shown in log

I have also tried this with custom segues and I have the same result.

EDIT:

After more testing, it appears to be throwing the bad access error randomly (most of the time, 80%+). If that exception is not thrown, the link opening in safari works, but the link to dismiss the view throws the proxy identifier error.

Any help would be greatly appreciated.

Answer 1

Ok, so total noob issue here. The issue was related to the use of a local variable within the method. ARC was killing the view in memory most of the time (my 80% reference). I moved the dst variable into my header file and everything works as expected.