背景:在 iPad 上，我有一个按钮，点击该按钮会显示一个 UIActionSheet。此操作表有 2 个选项，相机和画廊。点击相机，拉起相机，一切正常。点击图库时，假设显示一个带有用户照片的弹出窗口。

问题:在 iPad 上，UIActionSheet 就像一个弹出窗口。呈现时，无法看到另一个弹出窗口。错误:由于未捕获的异常“NSGenericException”而终止应用程序，原因:“-[UIPopoverController dealloc] 在弹出窗口仍然可见时达到。”

我的代码:
设置操作表

- (void)imageButtonTapped:(UIButton *)sender
{
    if (_commentObject.image){
        _actionSheet = [[UIActionSheet alloc] initWithTitle:@"Action" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Remove" otherButtonTitles:nil];
        _actionSheet.tag = ACTION_IMAGE_REVIEW_TAG;
    }else{
        _actionSheet = [[UIActionSheet alloc] initWithTitle:@"Image Source" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Camera", @"Gallery", nil];
        _actionSheet.tag = ACTION_IMAGE_SOURCE_TAG;
    }

    if (_isPad) {
        [_actionSheet showFromRect:_imageButton.frame inView:_scrollViewContent animated:YES];
    }else{
        [_actionSheet showInView:self.view];
    }
}

代表

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    switch (actionSheet.tag) {
        case ACTION_IMAGE_SOURCE_TAG:
            switch (buttonIndex) {
                case 0:
                    [self pickImage:YES];
                    break;
                case 1:
                    [self pickImage:NO];
                    break;
                default:
                    break;
            }
                break; 
}

执行

- (void)pickImage:(BOOL)fromCamera
{
    if (fromCamera) {
        if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
            UIImagePickerController* cameraPickerController = [[UIImagePickerController alloc] init];
            cameraPickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
            cameraPickerController.delegate = self;
            [self presentViewController:cameraPickerController animated:YES completion:nil];
        }else{
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Camera Unavailable" message:@"Your Device does not support Cameras" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
            [alert show];
        }
    }else{
        UIImagePickerController *galleryPickerController = [[UIImagePickerController alloc] init];
        galleryPickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        galleryPickerController.delegate = self;

        if (_isPad) {
            if ([_actionSheet isVisible]) {
                [_actionSheet removeFromSuperview];
                UIPopoverController *imagePickerPopover = [[UIPopoverController alloc] initWithContentViewController:galleryPickerController];
                [imagePickerPopover presentPopoverFromRect:_imageButton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
            }
        }else{
            [self presentViewController:galleryPickerController animated:YES completion:nil];
        }
    }
}

问题:我尝试从 View 中删除操作表，并尝试在执行 pickImage 之前将其关闭。这些都不起作用。我如何展示画廊？

最佳答案

您的问题:错误:由于未捕获的异常“NSGenericException”而终止应用程序，原因:“-[UIPopoverController dealloc] 在弹出窗口仍然可见时达到。

在您的 .h 文件类中创建 UIPopoverController 的对象。确保您的 UIPopoverController 的 @property 是强的而不是弱的。

检查这个

UIPopoverController: dealloc reached while popover is still visible

UIPopovercontroller dealloc reached while popover is still visible

关于ios - 在 iPad 上从 ActionSheet 显示 ImagePickerController，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18188922/