我在一组中运行了3个动画:位置,比例和旋转
但是我的旋转动画并不顺利。它在开始时突然发生,而其他动画则顺利发生。
这是我的代码:
//CABasicAnimation *scaleAnimation
//CABasicAnimation *moveAnimation
CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];
rotationAnimation.autoreverses = NO;
rotationAnimation.toValue = [NSNumber numberWithFloat: 0];//-(M_PI/3)];
//below line shows the end state, if removed, the layer will assume its initial position after animation, something which I don't want.
[layer setTransform:CATransform3DMakeRotation(0, 0, 1, 0)];
CAAnimationGroup *theGroup = [CAAnimationGroup animation];
//Code for adding all 3 animations to the group
编辑:
rotationAnimation.toValue = [NSNumber numberWithFloat: - (M_PI / 3)];
从动画声明的位置删除最终变换值,并将其添加到委托中。 (请注意,对于动画组,单个动画代表不会被击中,只有组代表工作)。
在代表下:
- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag
{
NSString * animName = [theAnimation valueForKey:@"animationName"];
CALayer* layer = [theAnimation valueForKey:@"animationLayer"];
if ([animName isEqualToString:@"MoveZoomOut"])
{
if ([layer.name isEqualToString:@"Layer1"])
[layer setTransform:CATransform3DMakeRotation(-M_PI/3, 0, 1, 0)];
else if ([layer.name isEqualToString:@"Layer2"])
[layer setTransform:CATransform3DMakeRotation(M_PI/3, 0, 1, 0)];
else
[layer setTransform:CATransform3DMakeRotation(0, 0, 1, 0)];
}
if ([layer respondsToSelector:@selector(setContentsScale:)])
{
layer.contentsScale = [UIScreen mainScreen].scale;
}
}
答案 0 :(得分:1)
我在一组中运行了3个动画:位置,比例和旋转
我怀疑,既然您通过transform
属性设置了缩放和旋转动画,则可能会发生冲突。
尝试通过将2个变换连接成一个动画,在单个动画中设置缩放和旋转动画:
CATransform3D t = CATransform3DMakeRotation(0, 0, 1, 0)];
[layer setTransform:CATransform3DScale(t, sx, sy, sz)];
编辑:
我知道发生的事情是非常不寻常的,所以我会给你一些关于技巧的提示,这些技巧在很多时候帮助了我。据我所知,你有3层动画。
[CATransaction begin]/[CATransaction commit]
; 如果这没有帮助,
animationDidStop:finished:
方法中。换句话说,给出你的代码:
CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];
rotationAnimation.autoreverses = NO;
rotationAnimation.toValue = [NSNumber numberWithFloat: 0];//-(M_PI/3)];
//below line shows the end state, if removed, the layer will assume its initial position after animation, something which I don't want.
[layer setTransform:CATransform3DMakeRotation(0, 0, 1, 0)];
CAAnimationGroup *theGroup = [CAAnimationGroup animation];
不要在那里做[layer setTransform:CATransform3DMakeRotation(0, 0, 1, 0)];
。相反,请在:
- (void)animationDidStop:(CAAnimation*)anim finished:(BOOL)flag {
[layer setTransform:CATransform3DMakeRotation(0, 0, 1, 0)];
}
由于您将有多个动画(并且可能会为所有动画使用相同的委托),因此您需要一种方法来判断animationDidStop:
方法引用的动画。为此目的,你可以做到,例如:
//-- se the delegate
rotationAnimation.delegate = self;
[rotationAnimation setValue:layer forKey:@"animationLayer"];
并在委托方法中:
- (void)animationDidStop:(CAAnimation*)anim finished:(BOOL)flag {
[CATransaction begin];
[CATransaction setDisableActions:YES];
CALayer* layer = [anim valueForKey:@"animationLayer"];
layer.transform = ...;
[CATransaction commit];
}
我知道这似乎有点做作。它是。但这是我能解决类似于你报道的问题的唯一方法。
希望这有帮助。
编辑:
对于使用animationDidStop:
时的故障,请尝试将animationDidStop:
内容包装在:
[CATransaction begin];
[CATransaction setDisableActions:YES];
...
[CATransaction commit];