CAAnimationGroup

- (void)viewDidLoad {

    [super viewDidLoad];

//    添加图片

    self.imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"2.jpg"]];

    self.imageView.frame = CGRectMake(30, 100, CGRectGetWidth(self.imageView.frame), CGRectGetHeight(self.imageView.frame));

    [self.view addSubview:self.imageView];

//    贝塞尔曲线路径

    UIBezierPath *movePath = [UIBezierPath bezierPath];

    [movePath moveToPoint:CGPointMake(10.0, 10.0)];

    [movePath addQuadCurveToPoint:CGPointMake(100, 300) controlPoint:CGPointMake(300, 100)];

//以下必须导入QuartzCore包

//关键帧动画（位置）

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

    posAnim.path = movePath.CGPath;

    posAnim.removedOnCompletion = YES;

//    缩放动画

    CABasicAnimation *scaleAnim = [CABasicAnimation animationWithKeyPath:@"transform"];

    scaleAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];

    scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)];

    scaleAnim.removedOnCompletion = YES;

//    透明动画

    CABasicAnimation *opacityAnim = [CABasicAnimation animationWithKeyPath:@"alpha"];

    opacityAnim.fromValue = [NSNumber numberWithFloat:1.0];

    opacityAnim.toValue = [NSNumber numberWithFloat:0.1];

    opacityAnim.removedOnCompletion = YES;

//    动画组

    CAAnimationGroup *animGroup = [CAAnimationGroup animation];

    animGroup.animations = [NSArray arrayWithObjects:posAnim,scaleAnim,opacityAnim, nil];

    animGroup.duration = 1;

    [self.imageView.layer addAnimation:animGroup forKey:nil];

    // Do any additional setup after loading the view, typically from a nib.

}