UIImagePickerController InterfaceOrientation崩溃

Question

自从我的设备更新到6.1后，我在尝试显示UIImagePickerController时遇到了崩溃。我只使用纵向方向。

崩溃：

  

原因： * 由于未捕获的异常'UIApplicationInvalidInterfaceOrientation'而终止应用，原因：'preferredInterfaceOrientationForPresentation必须返回支持的接口方向！'

这是我调用UIImagePickerController的地方：

if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
    //The device cannot make pictures
    [PMAlertDialog showWithTitle:NSLocalizedString(@"incompatibleDeviceDialogTitle", nil) message:NSLocalizedString(@"incompatibleDeviceDialogMessage", nil) andButtonTitle:NSLocalizedString(@"okButtonTitle", nil)];
    return;
}

if (_imagePicker == nil)
{
    _imagePicker = [[UIImagePickerController alloc] init];
    _imagePicker.delegate = self;
}

_imagePicker.allowsEditing = NO;
_imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
_imagePicker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];

[self presentModalViewController:_imagePicker animated:YES];

我已将这些方法添加到添加了UIImagePickerController的视图控制器中：

-(BOOL)shouldAutorotate
{
    return NO;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}

Answer 1

为了解决这个问题，我按如下方式制作了一个类别：

我创建了一个新的objective-c类，“UIImagePickerController + NonRotating”

在头文件（UIImagePickerController + NonRotating.h）中：

#import <Foundation/Foundation.h>

@interface UIImagePickerController (NonRotating)

- (BOOL)shouldAutorotate;
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation;

@end

在实现文件（UIImagePickerController + NonRotating.m）中：

#import "UIImagePickerController+NonRotating.h"

@implementation UIImagePickerController (NonRotating)

- (BOOL)shouldAutorotate {
    return NO;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationPortrait;
}

@end

当然，您可以根据自己的需要修改它 - 使其自动旋转并返回多个支持的方向等。