我试图在将每个按钮的 alpha 转换为 0.0 之间进行延迟,但我所拥有的不起作用。
[UIView animateWithDuration:1.5 delay:.25 options:UIViewAnimationCurveLinear animations:^{button.alpha = 0.0;
button2.alpha = 0.0;
button3.alpha = 0.0;
button4.alpha = 0.0;
button5.alpha = 0.0;} completion:^(BOOL finished){ ; }];
延迟动画是如何实现的?