ios 如何令一張圖片左右晃動

標籤：

 

//開始動畫

CABasicAnimation *momAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];

    momAnimation.fromValue = [NSNumber numberWithFloat:-0.3];

    momAnimation.toValue = [NSNumber numberWithFloat:0.3];

    momAnimation.duration = 0.5;

    momAnimation.repeatCount = CGFLOAT_MAX;

    momAnimation.autoreverses = YES;

    momAnimation.delegate = self;

    [_momImageView.layer addAnimation:momAnimation forKey:@"animateLayer"];

 

//暫停動畫，圖片未複位

-(void)pauseLayer:(CALayer*)layer

{

    CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];

    layer.speed = 0.0;

    layer.timeOffset = pausedTime;

 

}

 

//重新開始動畫

-(void)resumeLayer:(CALayer*)layer{

    CFTimeInterval pausedTime = [layer timeOffset];

    layer.speed = 1.0;

    layer.timeOffset = 0.0;

    layer.beginTime = 0.0;

    CFTimeInterval timeSincePause = [layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;

    layer.beginTime = timeSincePause;

 

}

 

//移除動畫，圖片複位

 

[self.momImageView.layer removeAllAnimations];

ios 如何令一張圖片左右晃動