当方向仅允许横向时，iOS 9 UIImagePickerControllerSourceTypePhotoLibrary崩溃

Question

每当我调用UIImagePickerControllerSourceTypeCamera来使用相机拍照时，我就创建了仅支持横向方向的应用程序，但是当我调用UIImagePickerControllerSourceTypePhotoLibrary时，它崩溃了。

我曾尝试使用shouldAutoRotate（）方法允许肖像，但仍然无法正常工作。 这个问题有什么解决办法吗？

Answer 1

当您在iPad上收到此错误时

尝试下面的代码，并为此使用UIModalPresentationStyle ：

                self.imagepicker.modalPresentationStyle = UIModalPresentationStyle.Popover
                let popover = self.imagepicker.popoverPresentationController
                self.imagepicker.preferredContentSize = CGSizeMake(400 ,400)
                popover!.sourceView = self.view
                popover!.sourceRect = CGRectMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds),0,0)
                popover!.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)
                self.presentViewController(self.imagepicker, animated: true, completion: nil)

这是在Swift中，希望您可以轻松地转换到Objective-C。

我希望这有帮助。

Answer 2

将modalPresentationStyle的imagePickerController设置为UIModalPresentationCurrentContext ，然后将其呈现。 就像是，

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;

Answer 3

将Presentviewcontroller代码放入NSOperationQueue

[[NSOperationQueue mainQueue] addOperationWithBlock:^{
            self.presentViewController(self.imagepicker, animated: true, completion: nil)
    }];

Answer 4

我给你解决方案

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.delegate = self;
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePicker.wantsFullScreenLayout = YES;

    UIPopoverController *imagePopover = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
    [imagePopover setDelegate:self];
    [imagePopover setPopoverContentSize:CGSizeMake(320, 500) animated:NO];  //set your content size
    [imagePopover presentPopoverFromRect:button.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionRight animated:YES];   //I give presentPopoverFromRect as button frame.Change here what you want

}