模仿《百度音乐HD》添加到下载框动画

上次听有人说喜欢《百度音乐HD》添加到下载动画 ，我就尝试模仿了下，没想到，今天code4app（地址）也有了这个，但是 这个动画基本相同，我们的思路还是部一样的。 都可以参考

。主要关键代码是：

- (void)tranAction:(id)sender {

    CGPoint fromPoint = self.imageView.center;

    //路径曲线
    UIBezierPath *movePath = [UIBezierPath bezierPath];
    [movePath moveToPoint:fromPoint];
    CGPoint toPoint = CGPointMake(20, 570);
    [movePath addQuadCurveToPoint:toPoint
                     controlPoint:CGPointMake(20,0)];

    CAKeyframeAnimation *moveAnim = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    moveAnim.path = movePath.CGPath;
    moveAnim.removedOnCompletion = YES;

    //旋转变化
    CABasicAnimation *scaleAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
    scaleAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
    //x，y轴缩小到0.1,Z 轴不变
    scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.3, 0.3, 1.0)];
    scaleAnim.removedOnCompletion = YES;

    //透明度变化
    CABasicAnimation *opacityAnim = [CABasicAnimation animationWithKeyPath:@"alpha"];
    opacityAnim.fromValue = [NSNumber numberWithFloat:1.0];
    opacityAnim.toValue = [NSNumber numberWithFloat:0.4];
    opacityAnim.removedOnCompletion = YES;

    //路径，旋转，透明度组合起来执行
    CAAnimationGroup *animGroup = [CAAnimationGroup animation];
    animGroup.animations = [NSArray arrayWithObjects:moveAnim, scaleAnim,opacityAnim, nil];
    animGroup.duration = 1;
    [self.imageView.layer addAnimation:animGroup forKey:nil];

}

效果如下：

效果土2 ：

源代码下载