UIbutton flashing动画

Question

我想知道是否可以将闪烁的动画应用到UIbutton。我在互联网上搜索，但只发现脉冲动画的代码，不断改变我的UIBUTTON的大小。我反而想着某种闪烁的动画来提醒用户他必须按下按钮。以我能想到的问题的唯一方法是通过改变阿尔法不断利用：

[self setAlpha:0.5]; 

...但它不会像可见的闪光按钮。

Answer 1

也许不是最好的方式，并没有真正让你停止闪烁......但是这是简单，有效，并且不会妨碍用户交互：

- (void)viewDidLoad 
{ 
    [self flashOn:myButton]; 
} 

- (void)flashOff:(UIView *)v 
{ 
    [UIView animateWithDuration:.05 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^ { 
     v.alpha = .01; //don't animate alpha to 0, otherwise you won't be able to interact with it 
    } completion:^(BOOL finished) { 
     [self flashOn:v]; 
    }]; 
} 

- (void)flashOn:(UIView *)v 
{ 
    [UIView animateWithDuration:.05 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^ { 
     v.alpha = 1; 
    } completion:^(BOOL finished) { 
     [self flashOff:v]; 
    }]; 
} 

Answer 2

也许你可以有两种不同的.png文件[按钮]这个周期在一个回环往复，同样的动作分配给他们，有这个揭开序幕只要满足特定条件。我会写出代码，但它可能会充满错误。你尝试过那样的事吗？

Answer 3

试试这个：

打电话时你想闪烁/闪光按钮

blinkTimer=[NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(toggleButtonImage:) userInfo:nil repeats:YES]; 

，写这个方法这个方法

- (void)toggleButtonImage:(NSTimer*)timer 
{ 

    if(toggle) 
    { 
     [blinkBtn setImage:[UIImage imageNamed:@"ButtonImage.png"] forState: UIControlStateNormal]; 
    } 
    else 
    { 
     [blinkBtn setImage:[UIImage imageNamed:@"ButtonImage1.png"] forState: UIControlStateNormal]; 
    } 
    toggle = !toggle; 

} 

在.H写

这个

NSTimer *blinkTimer; 
BOOL toggle; 

和无效要停止闪烁定时器/闪烁

[blinkTimer invalidate]; 

Answer 4

我创造我自己的控制，子类UIControl，因为苹果这样做不建议使用UIButton的视图层次结构。我添加了代表按钮标准背景图像的背景图像视图，以及背景上方的“发光”imageView以表示亮起状态，并切换其不透明度以使其变为脉冲。

我还切换图层的不透明度阴影，使其发光。

初始化代码：

- (void)TS_commonButtonInit 
{ 
    UIImage *shoutoutBackground   = [UIImage imageNamed:@"root-navigation-bar-share-button"]; 
    UIImage *shoutoutHighlightedBackground = [UIImage imageNamed:@"root-navigation-bar-share-button-highlighted"]; 
    UIImage *shoutoutPulseImage   = [UIImage imageNamed:@"root-navigation-bar-share-button-glowing"]; 

    shoutoutBackground   = [shoutoutBackground   stretchableImageWithLeftCapWidth:7 topCapHeight:0]; 
    shoutoutHighlightedBackground = [shoutoutHighlightedBackground stretchableImageWithLeftCapWidth:7 topCapHeight:0]; 
    shoutoutPulseImage   = [shoutoutPulseImage   stretchableImageWithLeftCapWidth:7 topCapHeight:0]; 

    [[self backgroundView] setImage:shoutoutBackground]; 
    [[self backgroundView] setHighlightedImage:shoutoutHighlightedBackground]; 

    [self setGlowingImage:shoutoutPulseImage]; 

    [self setExclusiveTouch:YES]; 

    [self addSubview:[self backgroundView]]; 
    [self addSubview:[self glowingImageView]]; 

    [[self layer] setShadowColor:[[UIColor colorWithHexString:@"ffc521" alpha:1] CGColor]]; 
    [[self layer] setShadowOpacity:0]; 
    [[self layer] setShadowRadius:5]; 
    [[self layer] setShadowOffset:CGSizeMake(0, 0)]; 
    [[self layer] setShadowPath:[[UIBezierPath bezierPathWithRoundedRect:[self bounds] cornerRadius:6] CGPath]]; 
} 

脉动代码：

- (void)pulse:(NSInteger)numberOfTimes 
{ 
    CGFloat pulseLength = .8; 

    [[self glowingImageView] setAlpha:0]; 

    CABasicAnimation *pulseAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"]; 
    [pulseAnimation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; 
    [pulseAnimation setDuration:pulseLength]; 
    [pulseAnimation setRepeatCount:numberOfTimes]; 
    [pulseAnimation setAutoreverses:YES]; 
    [pulseAnimation setFromValue:@(0)]; 
    [pulseAnimation setToValue:@(1)]; 
    [pulseAnimation setRemovedOnCompletion:YES]; 

    [[self layer] setShadowOpacity:0]; 

    CABasicAnimation *shadowAnimation = [CABasicAnimation animationWithKeyPath:@"shadowOpacity"]; 
    [shadowAnimation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; 
    [shadowAnimation setDuration:pulseLength]; 
    [shadowAnimation setRepeatCount:numberOfTimes]; 
    [shadowAnimation setAutoreverses:YES]; 
    [shadowAnimation setFromValue:@(0)]; 
    [shadowAnimation setToValue:@(1)]; 
    [shadowAnimation setRemovedOnCompletion:YES]; 

    [[[self glowingImageView] layer] addAnimation:pulseAnimation forKey:@"opacity"]; 
    [[self layer] addAnimation:shadowAnimation forKey:@"shadowOpacity"]; 
} 

Answer 5

阅读所有的答案到目前为止，我发现了以下解决方案。它重复了很多次，为我完成这项工作。

CGFloat oldAlpha = v.alpha; 
CGFloat minAlpha = 0.2; 
enum UIViewAnimationOptions options = UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionCurveEaseInOut; 

[UIView animateWithDuration:.3 delay:0.3 options:options animations:^{ 
    [UIView setAnimationRepeatCount:4]; 
    v.alpha = minAlpha; 
} 
completion:^(BOOL finished) { 
    v.alpha = oldAlpha; 
}];