我有一个CALayer来动画其图像内容的变化。现在,我该如何改变这个动画发生的时间?
答案 0 :(得分:19)
您可以致电:
[CATransaction setAnimationDuration:durationSecs]
在-layoutSublayers或您修改图层的任何其他位置,并期望它们隐式动画。这将影响当前隐式事务和此事务中的任何子事务。
答案 1 :(得分:10)
另一种方法:
[CATransaction begin];
[CATransaction setValue:[NSNumber numberWithFloat:2.5f] forKey:kCATransactionAnimationDuration];
//Perform CALayer actions, such as changing the layer contents, position, whatever.
aCALayerObject.contents = [self newCALayerContents];
[CATransaction commit];
该代码将在2.5秒内激活CALayer内容的更改。您也可以使用它来完全禁用所有动画。像这样:
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
答案 2 :(得分:7)
这或多或少都很简单。你有一个ivar CALayer *yourLayer
。然后设置委托并实现委托方法-(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
}