如何将 UIImagePickerController 推入 UINavigationController？

Question

我的程序中有以下编码，在 AppDelegate 中

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    // Override point for customization after application launch.

    myList = [[List alloc] init];
    mySettings = [[Settings alloc] init];
    myCriteria = [[Criteria alloc] initWithStyle:UITableViewStyleGrouped];

    first = [[UINavigationController alloc] initWithRootViewController:myList];
    second = [[UINavigationController alloc] initWithRootViewController:mySettings];
    third = [[UINavigationController alloc] initWithRootViewController:myCriteria]; 

    myTabBar = [[UITabBarController alloc] init];

    myTabBar.view.frame = CGRectMake(0,20,320,460);


    UITabBarItem *first1 = [[UITabBarItem alloc] initWithTitle:@"List" image:[UIImage imageNamed:@"list.png"] tag:0];
    UITabBarItem *second2 = [[UITabBarItem alloc] initWithTitle:@"My Profile" image:[UIImage imageNamed:@"settings.png"] tag:1];
    UITabBarItem *third3 = [[UITabBarItem alloc] initWithTitle:@"Criteria" image:[UIImage imageNamed:@"Criteria.png"] tag:2];


    UINavigationController *localNavigationController = [[UINavigationController alloc] initWithRootViewController:myTabBar];

    first.tabBarItem = first1;
    second.tabBarItem = second2;
    third.tabBarItem = third3;

    myControllerArray = [[NSArray alloc] initWithObjects:first, second, third, nil];

    [myTabBar setViewControllers:myControllerArray];
    [myTabBar setCustomizableViewControllers:myControllerArray];

    [self.window addSubview:myTabBar.view];

    // Add the view controller's view to the window and display.
   // [self.window addSubview:viewController.view];
    [self.window makeKeyAndVisible];

    return YES;
}

这三个是不同的类，现在我想使用相机和相册，所以当我在按钮目标上编写如下代码时，它不起作用

    - (void) useCamera
{

    if ([UIImagePickerController isSourceTypeAvailable:
         UIImagePickerControllerSourceTypeCamera])
    {
        NSLog(@"If is true");
        UIImagePickerController *imagePicker =
        [[UIImagePickerController alloc] init];

    //  [self.navigationController pushViewController:imagePicker animated:YES];

        imagePicker.delegate = self;
        imagePicker.sourceType = 
        UIImagePickerControllerSourceTypeCamera;
        imagePicker.mediaTypes = [NSArray arrayWithObjects:
                                  (NSString *) kUTTypeImage,
                                  nil];
        imagePicker.allowsEditing = NO;

        [self.tabBarController setCustomizableViewControllers:[[NSArray alloc]initWithObjects:imagePicker,self,nil]];
        [self.tabBarController setViewControllers:[[NSArray alloc]initWithObjects:imagePicker,self,nil]];

        //[self presentModalViewController:imagePicker animated:YES]; I tried

        //[self.view addSubview:imagePicker.view]; I tried
        //self.view=imagePicker.view; I tried


        //[myScrollView addSubview:imagePicker]; I tried
        //[myView addSubview:imagePicker]; I tried

        [imagePicker release];

        newMedia = YES;
    }
}

我尝试了上述所有方法，但它们无法正常工作并显示 UIImagePickerController，

现在我该怎么办

如果有人对我的问题不清楚，可以再问我.....

Answer 1

[self.view addSubview:imagePicker.cameraOverlayView]呢

另外，您是否尝试将任何其他视图添加到您的self.view？我想知道是否正在添加 imagePicker，但未加载，因为您将其添加到的视图未显示。

Answer 2

您是否尝试通过其中一个导航控制器呈现 imagePicker？

来自Reference

通过调用当前活动视图控制器的presentModalViewController:animated: 方法来呈现用户界面，将您配置的图像选择器控制器作为新的视图控制器传递。在 iPad 上，您也可以使用弹出框呈现用户界面，如 initWithContentViewController: 和 UIPopoverController 类参考中的“呈现和关闭弹出框”中所述。

Answer 3

如果使用 GKImagePicker：

[self.view addSubview:self.imagePicker.imagePickerController.view];

Answer 4

你总是可以这样做的：

  let cam        = UIImagePickerController()
  cam.delegate   = self
  cam.sourceType = .camera

  self.show(cam, sender: nil)

为我工作

Answer 5

您是否尝试通过 tabBarController 呈现 UIImagePickerController（UITabBarController 继承自 UIViewController）？假设您为 AppDelegate 创建了一个单例，并且 tabBarController 是 AppController 的一个属性（为方便起见，我在下面为单例添加了示例代码），代码将如下所示：

AppController.h

#import <UIKit/UIKit.h>

@interface AppController : NSObject <UIApplicationDelegate> {
  UITabBarController *tabBarController;
}
// Class methods for convenience
+ (AppController *)sharedAppController;

// *** Properties
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) UITabBarController *tabBarController;

@end

AppController.m

#import "AppController.h"

static AppController *sharedInstance;

@implementation AppController

@synthesize window=_window;
@synthesize tabBarController;

#pragma mark - Initialization
- (id)init
{
  // Create the sharedInstance of the application
  if (sharedInstance) {
    NSLog(@"Error: You are creating a second AppController");
  }
  [super init];
  sharedInstance = self;

  return self;
}

+ (AppController *)sharedAppController
{
  return sharedInstance;
}

- (void)dealloc
{
  [_window release];
  [tabBarController release];
  [super dealloc];
}

现在在您的班级中，在 useCamera 方法上通过执行以下操作调用 imagePicker：

- (void)useCamera
{
  // YOUR CODE ...

  // Place image picker
  [[[AppController sharedAppController] tabBarController] 
   presentModalViewController:imagePicker animated:YES];

  // YOUR RELEASE CODE ...
}

祝你好运，编码愉快！