- (void)viewDidLoad {

? ? [super viewDidLoad];

? ? _imageView = [[UIImageView alloc] initWithFrame:CGRectMake(90, 90, 90, 90)];

? ? _imageView.image= [UIImageimageNamed:@"joy.jpg"];

? ? [self.view? addSubview:_imageView];

}

- (void)touchesBegan:(NSSet *)toucheswithEvent:(UIEvent*)event{

? ? CGPointpoint = [[touchesanyObject]locationInView:self.view];

? CAKeyframeAnimation*animation1 =? [selfgetAniamtion1];

? CAKeyframeAnimation*animation2 =? [selfgetAnimation2:point];

? ? CAAnimationGroup *animationGroup = [CAAnimationGroup animation];

? ? animationGroup.animations=@[animation1,animation2];

? ? animationGroup.duration=3;

? ? animationGroup.repeatCount=MAXFLOAT;

? ? //加速方式: 勻速:kCAMediaTimingFunctionLinear

? ? animationGroup.timingFunction = [CAMediaTimingFunction? functionWithName:? kCAMediaTimingFunctionLinear];

? ? [_imageView.layer? addAnimation:animationGroupforKey:nil];

}

//獲取抖動(dòng)動(dòng)畫

-(CAKeyframeAnimation *)getAniamtion1{

? ? CAKeyframeAnimation *keyFrameAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"];

? ? keyFrameAnimation.duration=3;

? ? keyFrameAnimation.repeatCount=MAXFLOAT;

//? ? keyFrameAnimation.autoreverses = YES;

? ? CGFloat? angle? =? M_PI*2;

//? ? keyFrameAnimation.values = @[@(angle),@(-angle) ];

?keyFrameAnimation.values=@[@(angle),@0];

? ? [_imageView.layer? addAnimation:keyFrameAnimationforKey:nil];

? ? return? keyFrameAnimation;

}

-(CAKeyframeAnimation *)getAnimation2:(CGPoint )point{

? ? CAKeyframeAnimation *keyFrameAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];

? ? CGMutablePathRef path = CGPathCreateMutable();

? ? CGFloatw = point.x-_imageView.center.x;

? ? CGFloath = point.y-_imageView.center.y;

? ? CGRect? rect =CGRectMake(_imageView.center.x,_imageView.center.y, w, h);

? ? CGPathAddRect(path,NULL, rect);

? ? keyFrameAnimation.path= path;

? ? keyFrameAnimation.duration=3;

? ? returnkeyFrameAnimation;

}