Question

我正在使用以下代码显示UIImagePickerController来拍照：

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
[imagePicker setDelegate:self];    
[imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:imagePicker animated:YES completion:nil];

注意：self是一个嵌入在Container视图中的UIViewController，它本身也参与了UINavigationController

我还实现了以下方法：

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];  
    [self.imgProfile setImage:image];   
    [self dismissViewControllerAnimated:YES completion:nil];    
}

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

当我选择拍摄的图片或取消它时，UIImagePickerController会消失，但主视图也会消失！淡出黑色。

我在仅限iPad的应用上编写iOS7代码，以防它与它有任何关系。

这是一个显示问题的视频。请原谅模糊，但它是在NDA下。

http://www.youtube.com/watch?v=sIaPyRlIqyE

Answer 1

我在iOS7下遇到了同样的问题，我发现的唯一解决办法如下：

从VC中呈现选择器时;

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];

[self addChildViewController:picker] ;

[picker didMoveToParentViewController:self] ;

[self.view addSubview:picker.view] ;

然后，当处理选择器委托 - 而不是dismissModal时，使用;

[picker.view removeFromSuperview] ;
[picker removeFromParentViewController] ;

你失去的只是动画的礼物/解雇 - 除此之外，一切都应该好。

Answer 2

您应该关闭 选择器 ，而不是您的视图（自我）并确保添加这些：

<UINavigationControllerDelegate, UIImagePickerControllerDelegate>

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.imageView.image = chosenImage;

[picker dismissViewControllerAnimated:YES completion:NULL];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

[picker dismissViewControllerAnimated:YES completion:NULL];

}

Answer 3

尝试将您的图片选择器.modalPresentationStyle设置为.OverCurrentContext或.OverFullScreen：

可替换地：

viewController.definesPresentationContext = true
imagePicker.modalPresentationStyle = .CurrentContext OR .FullScreen

关键是这两个属性之间的关系需要保留：如果false然后是.OverCurrentContext，如果是true那么.CurrentContext

在我的情况下，我的视图控制器的.definesPresentationContext默认为false，所以我使用了第一个选项。

See documentation for some insight.

Answer 4

建议您在将相机胶卷打开到iPad时使用UIPopOver 所以试一试希望它可以帮助你。

#pragma mark
#pragma mark - Image Picker
-(IBAction)onClickTakePhoto:(id)sender
{
    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {

        imagePickerController = [[UIImagePickerController alloc] init];        
        imagePickerController.delegate = self;
        imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
        imagePickerController.mediaTypes = [UIImagePickerController  availableMediaTypesForSourceType:imagePickerController.sourceType];
        imagePickerController.allowsEditing = YES;

        if ([self respondsToSelector:@selector(presentViewController:animated:completion:)]) {
            [self presentViewController:imagePickerController animated:YES completion:nil];
        } else {
            [self presentModalViewController:imagePickerController animated:YES];
        }        
        [imagePickerController release];
    }
}

-(IBAction)onClickChooseFromLibrary:(id)sender
{
    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum])
    {
        imagePickerController = [[UIImagePickerController alloc] init];
        imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        imagePickerController.delegate = self;
        imagePickerController.allowsEditing = YES;
        imagePickerController.mediaTypes = [UIImagePickerController  availableMediaTypesForSourceType:imagePickerController.sourceType];
        popoverController= [[UIPopoverController alloc]
                        initWithContentViewController:imagePickerController];
        [popoverController presentPopoverFromRect:btnLibrary.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
    }
}

#pragma mark
#pragma mark - UIImagePickerDelegate
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{    
    if ([self respondsToSelector:@selector(dismissViewControllerAnimated:completion:)])   
    {
        [self dismissViewControllerAnimated:YES completion:nil];
    } else {
        [self dismissModalViewControllerAnimated:YES];
    }
    [popoverController dismissPopoverAnimated:YES];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{    
    if ([self respondsToSelector:@selector(dismissViewControllerAnimated:completion:)]) 
    {
        [self dismissViewControllerAnimated:YES completion:nil];
    } else {
        [self dismissModalViewControllerAnimated:YES];
    }

    [popoverController dismissPopoverAnimated:YES];
    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
    [userImage setLocalImage:image];
}

Answer 5

当UIImagePickerController正式解散时，它会在导航堆栈中紧跟VC后面的任何VC上触发以下方法：

- viewWillAppear
- viewDidAppear
- viewDidLayoutSubviews
a bunch of other methods having to do with basic VC lifecycle.

在我的情况下，我没有使用presentViewController:方法呈现最顶层的VC。我将它实例化为根VC的一个孩子并做一些自定义动画。我在-viewDidLayoutSubviews方法中完成了大部分工作。这项工作的一部分是指定我的孩子的框架在屏幕外的位置。

所以，当我将我的孩子视图动画到屏幕上，呈现相机，然后解散它时，应用程序最终触发了我的rootVC上的-viewDidLayoutSubviews，这将我的childVC移出屏幕。

所以，我想答案是确保初始VC设置代码只能触发一次（在放置所有内容之前使用类似Bool setupHasAlreadyHappenedOnce的内容）。

Answer 6

当我尝试从UIContainerView中呈现UIImagePickerController时，我有类似但不完全正确的问题。

问题是解雇UIImagePickerController改变了UIContainerView中的导航（调整大小到全屏）。

解决方案是从UIContainerView的PARENT视图控制器中呈现UIImagePickerController，现在一切都运行良好。

Answer 7

仅仅是为了注意，UIImagePickerController的委托是＆＃34;双委托＆＃34;，它还委托UINavigationControllerDelegate。请参阅下面的代码。

@property(nullable,nonatomic,weak) id <UINavigationControllerDelegate, UIImagePickerControllerDelegate> delegate;

因此，检查self是否也实现UINavigationControllerDelegate，并解除父视图控制器，如下所示。

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
    NSMutableArray *stack = [navigationController.viewControllers mutableCopy];
    if (stack.count >= 2) {
        [stack removeObjectAtIndex:(stack.count-2)];
    }
    navigationController.viewControllers = [stack copy];
    navigationController.delegate = nil;
}

好的，我做了，花了很多时间才发现。我的情况可能不是常见的情况。这仅供参考。

DIsmissing UIImagePickerController也使父母消失

7 个答案: