ios - ios 8中的相机显示黑屏

Question

此代码用于从相机一张一张地捕获图像，但在下次拍摄一张图像后，相机将打开但黑屏（喜欢它，快门关闭）。所有其他 ios 版本都可以工作，但在 ios 8 中不起作用。请告诉我该如何解决？

-(void)openCamera
 {
   if(![PickerHandler doesDeviceSupportMediaType:ITEM_TYPE_PHOTO])
   {
    [PickerHandler showNoDeviceSupportWarningForMediaType:ITEM_TYPE_PHOTO withDelegate:self];
   }
   else 
   {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;

    picker.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];
    [self presentViewController:picker animated:YES completion:nil];
   }

 }

Answer 1

转到 设置>隐私>图片...并检查您的应用是否具有权限。

在代码中，使用它来验证相机访问权限。

- (BOOL)authorizedCameraAccess
{
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    return  (status == AVAuthorizationStatusAuthorized);
}

Answer 2

此代码在模拟器中不起作用。

UIImagePickerController *videoScreen = [[UIImagePickerController alloc] init];
    videoScreen.sourceType = UIImagePickerControllerSourceTypeCamera;

    videoScreen.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil];

    videoScreen.allowsEditing = NO;
    videoScreen.delegate = self;

    [self presentViewController:videoScreen animated: YES completion:NO];

Answer 3

实现这个方法

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
 [self dismissViewControllerAnimated:NO completion:NO];
}