例外的iPad，的UIImagePickerController必须通过UIPopoverContr

我已经创建了从摄像机捕获图像的应用程序。 这是我的代码

 -(IBAction) showCameraUI {
    BOOL hasCamera = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera];
    UIImagePickerController* picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.sourceType = hasCamera ? UIImagePickerControllerSourceTypeCamera :    UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentModalViewController:picker animated:YES];
}

并实施了该委托方法获取所拍摄的图像

- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [picker dismissModalViewControllerAnimated:YES];
    UIImage* image = [info objectForKey:UIImagePickerControllerOriginalImage];
    UIImage *yourImageView = image;
}

如果用户取消控制器中实现该方法

- (void)imagePickerControllerDidCancel:(UIImagePickerController*)picker
{
    [picker dismissModalViewControllerAnimated:YES];
}

但它显示了这个例外。 没有人有任何想法，为什么它显示执行功能showCameraUI的最后一行后，这样的例外。

UIStatusBarStyleBlackTranslucent is not available on this device. 2013-02-07 
10:06:06.976 CaptureImage[460:c07] *** Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: 'On iPad, UIImagePickerController must be 
presented via UIPopoverController'

Answer 1:

关于异常，错误信息是非常明确的。 “在iPad上，的UIImagePickerController必须通过UIPopoverController呈现”为iPad，你应该呈现它在一个UIPopoverController而不是使用[self presentModalViewController:picker animated:YES]; 。 这应该可以解决这个问题。

对于如： -

if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
    UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:picker];
    [popover presentPopoverFromRect:self.view.bounds inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    self.popover = popover;
} else {
    [self presentModalViewController:picker animated:YES];
}

编辑：正如@rmaddy提到的，摄像头可以呈现模态。 上述适用于当sourceType是UIImagePickerControllerSourceTypePhotoLibrary 。

Answer 2:

@Arun我也面临着同样的问题，在头文件中添加全局属性。

我希望下面的代码是对你有用

UIImagePickerController *imgPicker = [[UIImagePickerController alloc] init];
   [imgPicker setDelegate:self];
   [imgPicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
   [imgPicker setAllowsEditing:YES];
   [imgPicker setModalPresentationStyle:UIModalPresentationCurrentContext];

   UIPopoverController *popOver = [[UIPopoverController alloc] initWithContentViewController:imgPicker];
   popOver.delegate = self;
   self.popoverImageViewController = popOver;
   [self.popoverImageViewController presentPopoverFromRect:CGRectMake(0, 0, 160, 40) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

在该头文件创建这样的全局属性

@property (strong) UIPopoverController *popoverImageViewController;

Answer 3:

对于斯威夫特与iOS11：

            videoEditor.modalPresentationStyle = .popover
            self.present(picker, animated: true)

            let popover = picker.popoverPresentationController
            popover?.sourceView = self.view

            // then config popover frame and arrow style here

文章来源: Exception in iPad, UIImagePickerController must be presented via UIPopoverController