iphone - 捏合像 Reeder 应用程序一样全屏拍照

试图想出一种方法来做与 reeder 应用程序创建者在他的 iphone/ipad 应用程序中所做的完全相同的事情，将照片捏合到全屏。

我在表格单元格中有一个 uiimageview，我想在双指打开或双击时转换为全屏 View 。也想使用类似的动画。

任何提示将不胜感激!

最佳答案

好吧，我设法自己把它放在一起。不太确定如何使用过渡方法，但我需要在同一位置复制 View ，然后将其炸毁。

http://screencast.com/t/MLTuGkIYh

因此，在包含大图像的单元格中，我连接了捏合和点击手势识别器。

    self.imageView.contentMode = UIViewContentModeScaleAspectFit;
    self.imageView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
    UIPinchGestureRecognizer *pinchGesture = [[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)] autorelease];
    UITapGestureRecognizer *tapGesture = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)] autorelease];
    tapGesture.numberOfTapsRequired = 2;
    self.imageView.userInteractionEnabled = YES;
    self.imageView.multipleTouchEnabled = YES;
    [self.imageView addGestureRecognizer:pinchGesture];
    [self.imageView addGestureRecognizer:tapGesture];
    [cell.contentView addSubview:self.imageView];

然后这里是其余的代码。基本上，当我识别出手势(以及捏合，确保它完成)时，我将复制的 View 放在相同的位置(通过 convertRect 获得)，然后为其框架和背景颜色设置动画。从它返回时，我做相反的事情。

- (void)handlePinchGesture:(id)sender
{
    if (((UIPinchGestureRecognizer *)sender).state == UIGestureRecognizerStateEnded) {
        if(((UIPinchGestureRecognizer *)sender).view == self.imageView)
        {
            if (((UIPinchGestureRecognizer *)sender).scale > 1) {
                [self showFloorPlanFullScreen];
            }
        } else {
            if (((UIPinchGestureRecognizer *)sender).scale < 1) {
                [self closeFloorPlanFullScreen];
            }
        }
    }
}
- (void)handleTap:(id)sender
{
    if (((UITapGestureRecognizer *)sender).view == self.imageView) {
        [self showFloorPlanFullScreen];
    } else {
        [self closeFloorPlanFullScreen];
    }
}

- (void)showFloorPlanFullScreen
{
    CGRect newRect = [self.imageView convertRect:self.imageView.bounds toView:[self.splitViewController.view superview]];
    UIImage *image = self.imageView.image;
    self.fullScreenImageView = [[[UIImageView alloc] initWithImage:image] autorelease];

    UIPinchGestureRecognizer *pinchGesture = [[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)] autorelease];
    UITapGestureRecognizer *tapGesture = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)] autorelease];
    tapGesture.numberOfTapsRequired = 2;
    self.fullScreenImageView.userInteractionEnabled = YES;
    self.fullScreenImageView.multipleTouchEnabled = YES;
    [self.fullScreenImageView addGestureRecognizer:pinchGesture];
    [self.fullScreenImageView addGestureRecognizer:tapGesture];

    self.fullScreenImageView.contentMode = UIViewContentModeScaleAspectFit;
    self.fullScreenImageView.frame = newRect;
    self.fullScreenImageView.backgroundColor = [UIColor clearColor];
    [[self.splitViewController.view superview] addSubview:self.fullScreenImageView];

    CGRect splitViewRect = self.splitViewController.view.frame;
    [UIView animateWithDuration:0.5 animations:^{
        self.fullScreenImageView.backgroundColor = [UIColor blackColor];
        self.fullScreenImageView.frame = splitViewRect;
    }];
}


- (void)closeFloorPlanFullScreen
{
    CGRect newRect = [self.imageView convertRect:self.imageView.bounds toView:[self.splitViewController.view superview]];
    [UIView animateWithDuration:0.5
                     animations:^{
        self.fullScreenImageView.backgroundColor = [UIColor clearColor];
        self.fullScreenImageView.frame = newRect;
                    }
                     completion:^(BOOL finished) {
                         [self.fullScreenImageView removeFromSuperview];
                         self.fullScreenImageView = nil;
                     }];
}

如果您希望图片在缩放时实际调整大小，我建议在捏合开始时立即添加重复 View (并且只要其缩放 > 1)，然后应用转换:

CGAffineTransform myTransformation = CGAffineTransformMakeScale(((UIPinchGestureRecognizer *)sender).scale, ((UIPinchGestureRecognizer *)sender).scale);
self.fullScreenImageView.transform = myTransformation;

一旦捏合达到结束状态，我就会淡入黑色并调整框架。我决定不采用这种方法，因为我认为仅识别捏合或双击就足够了。

关于iphone - 捏合像 Reeder 应用程序一样全屏拍照，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7022234/