ios - UILabel 闪烁效果

Question

我正在使用具有闪烁效果的 UIButton。我已将此代码用于 UIButton 的闪烁效果

UIButton *random = (UIButton *)[self.view viewWithTag:i+20];
random.alpha = 0;
[UIView animateWithDuration:0.2 delay:0.2 options:UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse animations:^{
         random.alpha = 1;
        } completion:nil];

此代码将使 UIButton 闪烁，但我想在闪烁 3 次后停止这种闪烁效果 我不知道如何停止这种闪烁效果。 因此，如果有人知道解决方案，请帮助我。 提前致谢。

Answer 1

使用 CABasicAnimation 代替 UIView 动画

UIButton *random = (UIButton *)[self.view viewWithTag:i+20];
random.alpha = 0;

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
[animation setFromValue:[NSNumber numberWithFloat:0.0]];
[animation setToValue:[NSNumber numberWithFloat:1.0]];
[animation setDuration:0.2f];
[animation setRepeatCount:3];
[animation setAutoreverses:YES];
[animation setRemovedOnCompletion:NO];
[random.layer addAnimation:animation forKey:@"animation"];