iphone - 动画，例如当您从 iPhone 照片库中删除时

Question

我尝试实现动画:当您进入 iPhone Gallery 时，按图像，您会看到全屏图像。在下方您可以看到带有垃圾桶按钮的工具栏。当您按下此按钮时，图像将被动画删除。我尝试实现这个，但我不知道如何实现图像转换，苹果使用。这是最好的，我能做到:

[UIView transitionWithView:self.view duration:0.1 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
        [self.view addSubview:scrollImageView];
    } completion:^(BOOL finished) {
        [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^{
            CGRect frame = scrollImageView.frame;
            frame.size = CGSizeMake(frame.size.width * 0.75, frame.size.height * 0.75);
            frame.origin = CGPointMake((size.width - frame.size.width) / 2, (size.height - frame.size.height) / 2);
            scrollImageView.frame = frame;
        } completion:^(BOOL finished) {
            [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^{
                CGRect frame = scrollImageView.frame;
                frame.size = CGSizeMake(frame.size.width * 0.05, frame.size.height * 0.05);
                frame.origin = CGPointMake(size.width, size.height);
                scrollImageView.frame = frame;
                CGAffineTransform transform = scrollImageView.transform;
                CGAffineTransform rotatedTransform = CGAffineTransformRotate(transform, 45 * 3.14 / 180);
                scrollImageView.transform = rotatedTransform;
            } completion:^(BOOL finished) {
                [scrollImageView removeFromSuperview];
            }];
        }];
    }];

提前谢谢你。

更新据我了解，我无法使用 Core-Animation 制作此动画，但是否有人可以建议我制作与 iPhone Gallery 动画最相似但不使用 OpenGL 的动画？

Answer 1

您可以使用以下示例制作此动画:

UIView *senderView = (UIView*)sender;

CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"transform"];
            anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
            anim.duration = 0.125;
            anim.repeatCount = 1;
            anim.autoreverses = YES;
            anim.removedOnCompletion = YES;
            anim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.2, 1.2, 1.0)];
            //[senderView.layer addAnimation:anim forKey:nil];


UIBezierPath *movePath = [UIBezierPath bezierPath];
            [movePath moveToPoint:icon.center];
            [movePath addQuadCurveToPoint:senderView.center
                             controlPoint:CGPointMake(senderView.center.x, icon.center.y)];

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

            CABasicAnimation *scaleAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
            scaleAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
            scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)];
            scaleAnim.removedOnCompletion = YES;

            CABasicAnimation *opacityAnim = [CABasicAnimation animationWithKeyPath:@"alpha"];
            opacityAnim.fromValue = [NSNumber numberWithFloat:1.0];
            opacityAnim.toValue = [NSNumber numberWithFloat:0.1];
            opacityAnim.removedOnCompletion = YES;

            CAAnimationGroup *animGroup = [CAAnimationGroup animation];
            animGroup.animations = [NSArray arrayWithObjects:moveAnim, scaleAnim, opacityAnim, nil];
            animGroup.duration = 0.5;
            [icon.layer addAnimation:animGroup forKey:nil];

我已经修改了代码，你必须在其中执行以下更改，将发送者 View 设置为self.view，并根据你的要求更改动画的结束点(目前是senderView.center)