UIImagePickerController 接口方向崩溃答案

【问题标题】：UIImagePickerController InterfaceOrientation CrashUIImagePickerController 接口方向崩溃
【发布时间】：2013-03-20 21:25:03
【问题描述】：

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。

崩溃：

原因：* 由于未捕获的异常“UIApplicationInvalidInterfaceOrientation”而终止应用程序，原因：“preferredInterfaceOrientationForPresentation 必须返回受支持的界面方向！”

这里是我调用 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 UIImagePickerController 的视图控制器中：

-(BOOL)shouldAutorotate
{
    return NO;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}

【问题讨论】：

标签： objective-c uiimagepickercontroller uiinterfaceorientation

【解决方案1】：

为了解决这个问题，我做了如下分类：

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

您当然可以根据自己的喜好对其进行修改 - 使其自动旋转并返回多个支持的方向等。

【讨论】：