Animation Blocks resets to original position after updating text

Question

I\'m currently testing my apps for the release of IOS 8. I noticed that after I performed an animation block, the animation resets if I update the text of any label. I ran a

Answer 1

This problem can be caused by having Auto Layout set on the UIView. Strictly speaking, if you're using Auto Layout, then you shouldn't animate the absolute position of objects -- you should animate their constraints instead.

Changing the label text once your animation is underway triggers a layout refresh, and iOS shuffles everything around to comply with the original view constraints. (I suspect this is a behavioural change from iOS7).

Quick fix: un-check Auto Layout on the View, and this should work as expected.

Answer 2

Try this. Put the desired animation in the finish block also.

    - (IBAction)move:(id)sender {

    [UIView animateWithDuration:0.4 delay:0.0
                     options:UIViewAnimationOptionBeginFromCurrentState
                     animations:^{


self.myButton.center = CGPointMake(200, 300);
                 }completion:^(BOOL finished){



         if(finished){
                         self.myLabel.text=@"moved";
 self.myButton.center = CGPointMake(200, 300);
                     }

                 }];
}