iOS CAKeyframeAnimation关键帧动画

- (void)viewDidLoad {

    [super viewDidLoad];

    _imageView = [[UIImageView alloc] initWithFrame:CGRectMake(90, 90, 30, 30)];

    _imageView.image= [UIImageimageNamed:@"011.png"];

    [self.viewaddSubview:_imageView];

}

//长按图片抖动效果的实现

- (IBAction)longPressAction:(id)sender {

    UILongPressGestureRecognizer *press = (UILongPressGestureRecognizer *) sender;

    if (press.state == UIGestureRecognizerStateBegan  ) {

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

        keyFrameAnimation.duration=0.1;

        keyFrameAnimation.repeatCount=MAXFLOAT;

        keyFrameAnimation.autoreverses=YES;

        CGFloat  angle  =  M_PI_4/8;

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

        UIImageView*imageView = (UIImageView*)press.view;

        [imageView.layer  addAnimation:keyFrameAnimationforKey:nil];

    }

}

//点击开始时调用

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

 CGPoint  p =  [[touchesanyObject]locationInView:self.view];

    [self moveAnimation:p];

    [self movePathArc:p];

    [self movePathStroke:p];

}

//曲线路径运动

-(void)movePathStroke:(CGPoint)point{

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

    CGMutablePathRef path = CGPathCreateMutable();

    CGPathMoveToPoint(path,NULL, point.x  , point.y);

//    CGPathAddCurveToPoint(path, NULL, 20, 200, 120, 20, 300, 200);

//    CGPathAddCurveToPoint(path, NULL, 120, 190, 30, 320, 150, 200);

//    CGPoint p1 = [self creatPoint];

//    CGPoint p2 = [self creatPoint];

//   

//    CGPathAddQuadCurveToPoint(path, NULL, p1.x, p1.y, p2.x, p2.y);

     CGPathAddQuadCurveToPoint(path, NULL, 10, 300, 300, 0);

    keyFrameAnimation.duration=3;

    keyFrameAnimation.repeatCount=MAXFLOAT;

    keyFrameAnimation.autoreverses=YES;

    keyFrameAnimation.path= path;

    [_imageView.layeraddAnimation:keyFrameAnimationforKey:nil];

    CGPathRelease(path);

}

//点击后以点击的点为圆形转动

-(void)movePathArc:(CGPoint)point {

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

    CGMutablePathRef path = CGPathCreateMutable();

    CGPathAddArc(path,NULL, point.x, point.y,100,0,M_PI*2,0);

    keyFrameAnimation.duration=2;

    keyFrameAnimation.repeatCount=MAXFLOAT;

    keyFrameAnimation.path= path;

    [_imageView.layeraddAnimation:keyFrameAnimationforKey:nil];

    CGPathRelease(path);

}

//生成随机点的方法

-(CGPoint)creatPoint{

    NSInteger x = arc4random_uniform(KScreenWidth);

    NSInteger y = arc4random_uniform(KScreenHeight);

    CGPointpoint =CGPointMake(x, y);

    returnpoint;

}

//移动动画

-(void)moveAnimation:(CGPoint)point{

//    CAKeyframeAnimation *animation = (CAKeyframeAnimation *)[_imageView.layer animationForKey:@"keyFrame"];

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

    //    CGPoint p1 = CGPointMake(30, 30);

    //    CGPoint p2 = CGPointMake(370, 10);

    //    NSValue *value1 = [NSValue valueWithCGPoint:p1];

    //    NSValue *value3 = [NSValue valueWithCGPoint:p2];

    NSValue*value2 = [NSValuevalueWithCGPoint:point];

    //将之前创建的点移除,每次点击的时候只有21个点

    NSMutableArray *_data = [[NSMutableArray alloc] init ];

        for(inti =0; i <20;  i ++) {

            CGPointp = [selfcreatPoint];

            NSValue*value = [NSValuevalueWithCGPoint:p];

            [_dataaddObject:value];

        }

    //停留在点击的位置

    keyFrameAnimation.removedOnCompletion=NO;

    keyFrameAnimation.fillMode=  kCAFillModeForwards;

    //动画时间

    keyFrameAnimation.duration=5;

    //添加元素,点击的点

    [_dataaddObject:value2];

    keyFrameAnimation.values= _data;

    [_imageView.layer  addAnimation:keyFrameAnimationforKey:@"keyFrame"];

}