拍摄照片后，会在导航堆栈上添加Subviewcontroller

Question

我在我的应用程序（inventoryviewcontroller）中实现了相机功能。

拍摄照片后，在invetoryviewcontroller上添加了图像，但是sectionviewcontroller消失了。似乎创建了一个导航堆栈并在sectionviewcontroller的顶部添加了inventoryviewcontroller。

点击提交按钮后，inventoryviewcontroller消失，出现了sectionviewcontroller。

我在我的设备上使用ios 8操作系统。

我怎么能解决这个问题？

// SectionViewController.m 
       iViewController = (InventoryViewController *)[self.storyboard  instantiateViewControllerWithIdentifier:@"InventoryViewController"];
        iViewController.view.frame = CGRectMake(728, 32, 300, 736);
        [self.view addSubview:iViewController.view];
        iViewController.view.tag = 17;

  // InventoryVieController.m 
 - (IBAction)cameraBtn:(id)sender {
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
        [self presentViewController:picker animated:YES completion:NULL];

    }

    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
        UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
        self.noteImageView.image = chosenImage;
        [picker dismissViewControllerAnimated:YES completion:NULL];

    }

    - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
        [picker dismissViewControllerAnimated:YES completion:NULL];
    } 

  - (IBAction)submitBtn:(id)sender {
         UIView *viewToRemove = [self.view viewWithTag:17];
         [viewToRemove removeFromSuperview];
    } 

拍摄照片之前：

拍摄完图像后：

Answer 1

当将其视图添加到SectionViewController视图时，问题原因是没有将InventoryViewController添加为子视图控制器。所以这样做的代码就是这样，

    iViewController = (InventoryViewController *)[self.storyboard  instantiateViewControllerWithIdentifier:@"InventoryViewController"];
    [self addChildViewController: iViewController];
    [iViewController didMoveToParentViewController: self];
    iViewController.view.frame = CGRectMake(728, 32, 300, 736);
    [self.view addSubview:iViewController.view]; 

删除视图时，也应删除子项（此代码在子项中），

- (IBAction)submitBtn:(id)sender {
    [self.view removeFromSuperview];
    [self willMoveToParentViewController:nil];
    [self removeFromParentViewController];
}