分配 cameraOverlyView 属性时未调用 UIImagePickerController didFinishPickingMediaWithInfo

Question

我设置了一个 UIImagePickerController 模态视图来录制视频，一旦用户选择 "Use Video" 它就会很好地关闭视图控制器并执行我想要的操作。然而，一旦我添加了一个 cameraOverlayView，它只是一个 UIView，没有任何特别的事情发生，didFinishPickingMediaWithInfo 就永远不会被调用。即使我将 NSLog 放在该函数的第一行，我也看不到任何输出。更奇怪的是，当用户按下“取消”按钮时，UIImagePickerControllerDidCancel 仍然会被调用。

之前关于 SO 的建议似乎没有帮助，因为我已经设置了委托并相应地设置了编辑属性，这与这些热门帖子不同：

uiimagepickercontroller didfinishpickingmediawithinfo NOT CALLED when selecting a video from the library

UIImagePickerController didFinishPickingMediaWithInfo not being called

这是启动 UIImagePickerController 的代码（取自 Ray Wenderlich 教程）：

-(BOOL)startCameraControllerFromViewController:(UIViewController*)controller
                                 usingDelegate:(id )delegate {

    if (([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO)
        || (delegate == nil)
        || (controller == nil)) {
        return NO;
    }

     if(![delegate conformsToProtocol:@protocol(UIImagePickerControllerDelegate) ]) {        
        NSAssert(nil, @"delegate muste conforms to UIImagePickerControllerDelegate protocol");
    }else{
         NSLog(@"delegate does conform to protocol");
     }  

    CGRect screenRect = [[UIScreen mainScreen]bounds];
    CGFloat screenWidth = screenRect.size.width;
    CGFloat screenHeight = screenRect.size.height;
    CameraOverlay *overlay = [[CameraOverlay alloc]initWithFrame:CGRectMake(0, 0, screenWidth, screenHeight)];
    UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
    cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
    cameraUI.delegate = delegate;
    cameraUI.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil];
    cameraUI.allowsEditing = NO;
    //if I comment out the line below, everything works fine.
    //but if I don't comment this out, didFinishPickingMediaWithInfo is never called
    cameraUI.cameraOverlayView = overlay;
    [controller presentModalViewController: cameraUI animated: YES];
    return YES;
}

这是didFinishPickingMediaWithInfo的部分：

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

    NSLog(@"did finish picking media with info");

    NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
    [self dismissModalViewControllerAnimated:NO];
    // I also tried [picker dismissModalViewControllerAnimated:NO];
    //despite it not being its own delegate, but in any case
    //this did not change the result

...
}

我按照 Andrey 的建议添加了有效的委托检查，但现在我总是看到 "delegate does conform to protocol"，无论覆盖是否存在以及 didFinishPickingMediaWithInfo 是否被调用。

对于尝试什么或代码中的错误有什么建议吗？感谢您的观看。

Answer 1

以下是最终起作用的方法：将叠加视图的 userInteractionEnabled 设置为 FALSE。

我希望我知道这是错误还是功能。我查看了一些创建叠加视图的教程，none 提到设置这个属性。如果有人能完全解释为什么这会产生影响，我想标记一个比这更完整的答案。

Answer 2

@sunny 终于正确解决了！ userInteractionEnabled = FALSE 确实调用了 didFinishPickingMediaWithInfo

分配 cameraOverlyView 属性时未调用 UIImagePickerController didFinishPickingMediaWithInfo

UIImagePickerController didFinishPickingMediaWithInfo not being called when cameraOverlyView property is assigned

objective-c

uiimagepickercontroller

ios

分配 cameraOverlyView 属性 时未调用 UIImagePickerController didFinishPickingMediaWithInfo

UIImagePickerController didFinishPickingMediaWithInfo not being called when cameraOverlyView property is assigned

objective-c

uiimagepickercontroller

ios

分配 cameraOverlyView 属性时未调用 UIImagePickerController didFinishPickingMediaWithInfo