ios - 如何从表格 View 中正确放大图像

Question

我正在使用以下代码从表格 View 中缩放/放大图像。我希望它放大到全屏。当前的问题是，当它放大时，它仅在表格单元格内放大(因此部分隐藏在下一个表格单元格下方)而不是完整 View 。

    -(void)zoomPhotoMethod :(id) sender
{
    UITapGestureRecognizer *gesture = (UITapGestureRecognizer *) sender;
    NSLog(@"Tag = %d", gesture.view.tag);

    userSubmittedImageView = (UIImageView *)gesture.view;

    if (!isFullScreen) {
        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
            //save previous frame
            prevFrame = userSubmittedImageView.frame;

            UIView *popupImageViewForTableCell = [[UIView alloc] initWithFrame: CGRectMake ( 0, 0, 320, 500)];

            [userSubmittedImageView setFrame:[popupImageViewForTableCell bounds]];


        }completion:^(BOOL finished){
            isFullScreen = TRUE;
        }];
        return;
    }
    else{
        [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
            [userSubmittedImageView setFrame:prevFrame];
        }completion:^(BOOL finished){
            isFullScreen = FALSE;;
        }];
        return;
    }


}

更新代码:

   -(void)zoomPhotoMethod :(id) sender
{
    UITapGestureRecognizer *gesture = (UITapGestureRecognizer *) sender;
    NSLog(@"Tag = %d", gesture.view.tag);

    userSubmittedImageView = (UIImageView *)gesture.view;

    if (!isFullScreen) {
        [UIView animateWithDuration:0.3 delay:0 options:0 animations:^{
            //save previous frame
            prevFrame = userSubmittedImageView.frame;


            newView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 500)];

            [self.view addSubview:newView];

            UIView *popupImageViewForTableCell = [[UIView alloc] initWithFrame: CGRectMake ( 0, 0, 320, 500)];

            [userSubmittedImageView setFrame:[popupImageViewForTableCell bounds]];

            [newView addSubview:userSubmittedImageView];

            [userSubmittedImageView setFrame:[newView bounds]];

        }completion:^(BOOL finished){
            isFullScreen = TRUE;
        }];
        return;
    }
    else{
        [UIView animateWithDuration:0.3 delay:0 options:0 animations:^{

            [userSubmittedImageView setFrame:prevFrame];


            [newView setFrame:prevFrame];

        }completion:^(BOOL finished){
            isFullScreen = FALSE;;
        }];
        return;
    }


}

Answer 1

发生的事情是您仍然是 tableview 单元格的 subview ，因此它不能在不被剪裁的情况下超出这些范围。

要做你想做的事，你必须:

在表格 View 之外创建一个新的 UIImageView(将其添加为表格 View 之外的 subview )。

将 ImageView 中的图像设置为与表格 View 单元格中相同的图像。

以与 tableview 单元格图像相同的大小和位置启动它。

将其动画到您想要的位置。

当需要删除它时，将其移回原始的 tableview 单元格图像。

丢弃 ImageView 。