UIView animateWithDuration等待，直到动画完成

Question

我在按钮触摸后运行动画。如果用户在当前动画完成前触摸该按钮，我希望新的动画等到当前动画完成。我该怎么做？

Answer 1

巢它的UIView的animateWithDuration包装的，像这样完成的变化：

[UIView animateWithDuration:1.00 animations:^{ 
    //animate first! 
    } 
        completion:^(BOOL finished) { 
         [UIView animateWithDuration:1.00 animations:^{ 
         //animate the second time. 
         }]; 
    }]; 

或者只设置一个动画从它继续与这个当前状态：

[UIView animateWithDuration:1.00 
          delay:0.00 
         options:UIViewAnimationOptionBeginFromCurrentState 
        animations:^{ 
         //animate 
        } 
        completion:^(BOOL finished){ 

    }]; 

Answer 2

我总是连锁我动画与此：

[self performSelector:@selector(animationDone) withObject:nil afterDelay:1.0];