NavigationController initWithRootViewController崩溃app iOS8

Question

我正在尝试使用以下代码在UIImagePickerController中展示UINavigationController：

UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init];
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.delegate = self;
imagePicker.showsCameraControls = NO;
imagePicker.modalPresentationStyle = UIModalPresentationOverCurrentContext;
self.tabBarController.tabBar.hidden = YES;

NSLog(@"HERES THE self.peresntingviewcontorller:: %@", self.presentingViewController);

//[self presentViewController:imagePicker animated:YES completion:^{}];
UINavigationController *cameraNavigationController = [[UINavigationController alloc] initWithRootViewController:imagePicker];  //ERROR HERE
[self presentViewController:cameraNavigationController animated:YES completion:nil];

但是我收到了一个错误，我添加了评论＆＃34; //错误在这里＆＃34;，我试图启动导航控制器的行，我的UIImagePickerController的根视图名为 imagePicker 即可。我不知道我做错了什么？有什么帮助吗？

错误是：

  

由于未捕获的异常而终止应用   ＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39;推送导航控制器   不受支持＆＃39;

Answer 1

UIImagePickerController派生自UINavigationController，这就是为什么你不能把它推到另一个UINavigationController（或设置为根视图控制器）。

Answer 2

听起来您正试图将导航控制器推到另一个导航控制器上。你应该做这样的事情：

UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init];
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.delegate = self;
imagePicker.showsCameraControls = NO;
imagePicker.modalPresentationStyle = UIModalPresentationOverCurrentContext;
self.tabBarController.tabBar.hidden = YES;

[self presentViewController:imagePicker animated:YES completion:nil];