UIButton闪烁的动画 [英] UIButton flashing animation

问题描述

我想知道是否可以将闪烁的动画应用于UIButton。我已经搜索过，但只找到了用于脉冲动画的代码，该代码会不断更改UIButton的大小。相反，我在考虑某种闪烁的动画，以提醒用户他必须按下按钮。我能想到的唯一方法就是通过不断更改alpha来使用：

I was wondering if it was possible to apply a flashing animation to a UIButton. I have searched but only found the code for a pulse animation which changes the size of my UIButton continuously. I instead was thinking about some kind of flashing animation to alert the user he has to press the button. The only approach to the problem I can think of is by changing the alpha constantly using:

[self setAlpha:0.5]; 

...但它不会像闪烁的按钮一样可见。

...but it won't be as visible as a flashing button.

推荐答案

也许不是最好的方法，并且实际上并不允许您停止闪烁……但这很简单，有效，并且不能阻碍用户互动：

Perhaps not the best way, and doesn't really allow you to stop the flashing... but this is simple, works, and does not hinder user interaction:

- (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];
    }];
}

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