更改CALayer的属性的动画时间 [英] Change animation time for properties of a CALayer

问题描述

我有一个CALayer，用于动画更改其图片内容。现在，我如何改变这个动画发生的时间？

I have a CALayer to animate a change in its image contents. Now, how can I change how long it takes for this animation to take place?

推荐答案

这或多或少简单。您有一个ivar CALayer * yourLayer 。然后设置委托并实现委托方法 - （id< CAAction>）actionForLayer：forKey：

It's more or less simple. You have an ivar CALayer *yourLayer. Then you set the delegate and implement the delegate method -(id<CAAction>)actionForLayer:forKey:

- (void)awakeFromNib {
    yourLayer.delegate = self;
    yourLayer.name = @"yourLayer";
}  
- (id <CAAction>)actionForLayer:(CALayer *)layer forKey:(NSString *)event {
    if([layer.name isEqualToString yourLayer.name]) { // Check for right layer

        CABasicAnimation *ani = [CABasicAnimation animationWithKeyPath:event]; // Default Animation for 'event'
        ani.duration = .5; // Your custom animation duration
        return ani;

    } else return nil; // Default Animation
}

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