警告：在演示文稿正在进行时尝试在<takephotoviewcontroller>上显示<adjustphotoviewcontroller> </takephotoviewcontroller> </adjustphotoviewcontroller>

Question

我正在使用xcode 4.5.2并为相机按钮创建了我自己的OverlayViewController。

现在，当我的委托控制器 - TakePhotoViewController从OverlayViewController检索didFinishWithCamera操作时，我想将用户转移到AdjustPhotoViewController。

但是，我收到以下警告，但未被转移：

  

警告：尝试出现    正在进行演示！

- (void)didFinishWithCamera
{
    [[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:YES completion:nil];
    [self performSegueWithIdentifier:@"fromTakeToAdjust" sender:self];    
}

Answer 1

实际上，根据我的经验，这与从同一个按钮调用segue和IBAction（调用segue）有关 - 检查Interface Builder中的连接检查器，看看你的按钮是否连接到两者。

在你的故事板中，它可能如下所示：

在您的代码中，它可能如下所示：

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if([segue.identifier isEqualToString:@"pushToNewVC"]) {
        UIViewController *controller = (UIViewController *)segue.destinationViewController;
    }
}

=

- (IBAction)launchNew VC:(id)sender {
    [self performSegueWithIdentifier:@"pushToNewVC" sender:sender];
}

Answer 2

您可以尝试这样做，为旧过渡完成和新过渡提供时间

通常0.3有效，但可根据需要进行调整

- (void)didFinishWithCamera
{
    [[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:YES completion:nil];
    [self performSelector:@selector(showModel) withObject:nil afterDelay:0.3];
}

- (void)showModel {
    [self performSegueWithIdentifier:@"fromTakeToAdjust" sender:self];
}

Answer 3

请使用以下代码进行叠加视图控制。

请与您核实代码。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  
    [self.window addSubview:self.view];
    [self.window makeKeyAndVisible];

    return YES;
}

在代码使用后的viewdidload事件中

- (void) viewDidLoad {
    self.picker = [[UIImagePickerController alloc] init];
    self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    self.picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;

    self.picker.showsCameraControls = NO;
    self.picker.wantsFullScreenLayout = YES;

    // Insert the overlay
    self.overlay = [[Customview alloc] initWithNibName:@"Customview" bundle:nil];
    self.overlay.pickerRef = self.picker;
    self.picker.cameraOverlayView = self.overlay.view;

    [self presentModalViewController:self.picker animated:NO];
}

在代码中使用

的视图.h方法

   @interface CameraController : UIViewController {
        UIImagePickerController* __picker;
        Customview* __overlay;
    }

@property (nonatomic, retain) UIImagePickerController* picker;
@property (nonatomic, retain) Customview* overlay;

希望上面的代码对您有所帮助。

Answer 4

Odelya，您应该在完成块中执行一些动画（在此cae控制器解雇中）后执行的UI操作！它实际上是为这些目的而创建的。像这样编辑你的代码：

- (void)didFinishWithCamera
{
    if(![[self.overlayViewController.imagePickerController presentingViewController] isBeingDismissed]) {
        [[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:YES completion:^ {
            [self performSegueWithIdentifier:@"fromTakeToAdjust" sender:self];
        }];
    }   
}

编辑：我已经添加了if语句，请立即尝试。

Answer 5

问题是在TakePhotoViewController中，我有：

- (void)viewDidAppear:(BOOL)animated{
   [self openImagePicker];
}

这会导致打开图像选择器，同时尝试将其关闭。

我添加了一个标志来检查它。