Question

我设置UIImagePickerController模式视图来录制视频，一旦用户选择＆＃34;使用视频＆＃34;它可以很好地解除视图控制器的问题，完全符合我的要求。但是，只要我添加一个cameraOverlayView，它只是一个没有任何特殊功能的UIView，就永远不会调用didFinishPickingMediaWithInfo。即使我在该功能的第一行放置了NSLog，我也看不到任何输出。更奇怪的是，当用户按下“取消”按钮时，仍会调用UIImagePickerControllerDidCancel。

关于SO的先前建议似乎没有用，因为我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

这里是启动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：

的一部分

(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＆＃34;委托确实符合协议＆＃34;无论叠加层是否在，并且didFinishPickingMediaWithInfo被调用。

有关代码尝试或错误的建议吗？谢谢你看看。

Answer 1

以下是最终有用的内容：为覆盖视图设置userInteractionEnabled到FALSE。

我希望我知道这是一个错误还是一个功能。我查看了几个用于创建叠加视图的教程，没有提到设置此属性。如果有人能够完全解释为什么这会带来不同，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调用didFinishPickingMediaWithInfo

分配cameraOverlyView属性时，UIImagePickerController didFinishPickingMediaWithInfo未被调用

2 个答案: