我试图让图标“颤抖”。
在加载我的控制器时,我创建了一个这样的Timer:
[NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(shakeIphonePic) userInfo:nil repeats:YES];
这是我的摇床方法:
- (void)shakeIphonePic
{
[UIView animateWithDuration:0.09
delay:0
options:UIViewAnimationOptionAllowUserInteraction
animations:^{
self.iphonePic.layer.transform = CATransform3DMakeRotation(DegreesToRadians(8.0), 0.0, 0.0, 1.0);
}
completion:^(BOOL finished) {
[UIView animateWithDuration:0.09
animations:^(void) {
self.iphonePic.layer.transform = CATransform3DMakeRotation(DegreesToRadians(-16.0), 0.0, 0.0, 1.0);
}];
}
];
}
它不如我预期的那么好但是......这不是主要问题。
看起来它显着减慢了我的UI的其余部分,之前很好。
你能否建议我更有效地动摇我的偶像?
答案 0 :(得分:27)
CABasicAnimation* anim = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
[anim setToValue:[NSNumber numberWithFloat:0.0f]];
[anim setFromValue:[NSNumber numberWithDouble:M_PI/16]]; // rotation angle
[anim setDuration:0.1];
[anim setRepeatCount:NSUIntegerMax];
[anim setAutoreverses:YES];
[self.viewYouAreShaking.layer addAnimation:anim forKey:@"iconShake"];
Swift版本
let anim=CABasicAnimation(keyPath: "transform.rotation")
anim.toValue=NSNumber(double: -M_PI/16)
anim.fromValue=NSNumber(double: M_PI/16)
anim.duration=0.1
anim.repeatCount=1.5
anim.autoreverses=true
viewYouAreShaking.layer.addAnimation(anim, forKey: "iconShake")