iOS 7.1 removeFromSuperview crash

Question

My app didn\'t have any crash until iOS 7.1 came out. Now on any removeFromSuperview method, crash. For example: I got view controllers, and when I

Answer 1

1.According to the Apple's documentation, calling removeFromSuperview will remove that view from superview and release it automatically.

So if you are using removeFromSuperview, then you should not call the [removedView release], which will crash your App.

Refer this screenshot from Apple. 

In your dealloc implementation, you are having like so

- (void) dealloc {

    // Removed from Parent view and released.
    [mainView removeFromSuperview];

    // no mainView exists in memory , so it crashed the App.
    [mainView release];// Comment this line to avoid the crash

    [super dealloc];
}

2.You should not mute the container that are being enumerated.

You are having like this,

for (UIView *subView in [contentVc subviews])
     [subView removeFromSuperview];

Instead you can implement the same effect by having this one line from Apple.

[[contentVc subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];