闪烁动画问题

Question

我的视图控制器中的动画有问题。我有两个UIViews：蓝色视图和绿色视图。蓝色视图位于绿色视图之上。在绿色视图中，我有一个UIView，它是一个动画正弦波，另一个UIView 称为“recordingIndicatorView”，它由一个实现了闪烁动画的文本标签组成。当我向上滑动蓝色视图时，会显示绿色视图，正弦波视图开始动画，recordingIndicatorView 开始闪烁。当我向下滑动蓝色视图时，动画结束，正弦视图和recordingIndicatorView 被隐藏。

但是，如果我向上滑动蓝色视图，向下滑动，然后快速向上滑动蓝色视图，闪烁动画会被丢弃并开始更快地闪烁。

- (IBAction)handleUpSwipe:(UISwipeGestureRecognizer *)recognizer
{

    if(viewIsUp == NO)
    {        

         [self.sineWave animateWave];

         [self showSine];

         [UIView animateWithDuration:.25 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{

             [self moveViewsUp];

         } completion:^(BOOL finished){

         }];

         stopBlinking = NO;

        [self.recordingIndicatorView setHidden:NO];
        [self flashOn:self.recordingIndicatorView];

     }
 }

- (IBAction)handleDownSwipe:(UISwipeGestureRecognizer *)recognizer
{

    if(viewIsUp == YES)
    {

         [self stopRecording];

         if(self.panedView.frame.origin.y <0)
         {

             [UIView animateWithDuration:.25 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{

                [self hideSine];
                [self moveViewsDown];

         } completion:^(BOOL finished){

        [self.sineWave.layer removeAllAnimations];

        }];

        }
    }
}

-(void) stopRecording
{
     stopBlinking = YES;
     [self hideSine];
     [self.recordingIndicatorView setHidden:YES];
}


- (void)flashOff:(UIView *)v
{
     [UIView animateWithDuration:.5 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^ {
        self.recordingIndicatorView.alpha = 0.01;  
         } completion:^(BOOL finished) {

        if(stopBlinking == NO)
        {
             [self flashOn:self.recordingIndicatorView];
        }

    }];
}


- (void)flashOn:(UIView *)v
{
    [UIView animateWithDuration:.5 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^ {
         self.recordingIndicatorView.alpha = 1;
     } completion:^(BOOL finished) {
         [self flashOff:self.recordingIndicatorView];
    }];
}

-(void) moveViewsDown
{
    if(viewIsUp)
    {
    self.panedView.frame = CGRectOffset( self.panedView.frame, 0, 274);
    self.sineWave.frame = CGRectOffset(self.sineWave.frame, 0, 246);
    self.micImageView.frame = CGRectOffset(self.micImageView.frame, 0, 85.5);
    viewIsUp = NO;

    }
}

 -(void) moveViewsUp
{
    if(!viewIsUp)
    {
    self.panedView.frame = CGRectOffset(self.panedView.frame, 0, -274);
    self.sineWave.frame = CGRectOffset(self.sineWave.frame, 0, -246);
    self.micImageView.frame = CGRectOffset(self.micImageView.frame, 0, -85.5);
    viewIsUp = YES;
    }
}

Answer 1

我认为你的闪烁动画被添加了不止一次。 viewIsUp 标志可能有些混乱。这是我在没有其他代码的情况下所能找到的。并且尽量不要在块中使用self，这是一个坏习惯，会导致隐藏错误和内存泄漏，请改用weak self，例如：

__weak typeof(self) wSelf = self;
[UIView animateWithDuration:.25 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
    [wSelf hideSine];
    [wSelf moveViewsDown];
} completion:^(BOOL finished){
    [wSelf.sineWave.layer removeAllAnimations];
}];