非模態UIImagePickerController，點擊焦點不起作用

Question

我在非模態設置中使用UIImagePickerController，如下所示：

UIImagePickerController *_imagePickerVC = // init the VC with the main camera as the source
[_mainCameraPreviewContainer addSubview:_imagePickerVC.view];
[_mainCameraPreviewContainer bringSubviewToFront:_imagePickerVC.view];

這是有效的，我可以拍照，但我無法點擊預覽區域，使相機專注於該點。 我嘗試通過添加以下兩行中的一行或兩行來修復此問題：

_imagePickerVC.showsCameraControls = NO;
_imagePickerVC.view.userInteractionEnabled = YES;

但沒有運氣。 當我讓它顯示相機控件時，我確實得到了閃光模式按鈕和按鈕來選擇相機，但這些按鈕也不是可以點擊的。 是否有可能讓水龍頭專注於我的工作？

Answer 1

我重復你的代碼並點擊聚焦和按鈕工作。 （iOS 5.1,6.1）。

- (IBAction)buttonTap:(id)sender {
    if (!_imagePickerVC)
    {
        _imagePickerVC = [UIImagePickerController new];
        _imagePickerVC.sourceType = UIImagePickerControllerSourceTypeCamera;
    }

    [self.view addSubview:_imagePickerVC.view];
    [self.view bringSubviewToFront:_imagePickerVC.view];
}

確保mainCameraPreviewContainer.userInteractionEnabled == YES 。

Answer 2

http://jcuz.wordpress.com/2010/02/17/pickerfocus/你可以嘗試一下。

我建議你使用AVfoundation實現。 它更容易，更靈活。 使用AVFoundation ios AVFoundation點擊聚焦

Answer 3

試試這個讓我知道..

_imagePickerVC.view.userInteractionEnabled = YES;
UIPanGestureRecognizer *pgr = [[UITapGestureRecognizer alloc] 
                               initWithTarget:self action:@selector(handleTap:)];

[_imagePickerVC addGestureRecognizer:pgr];
[pgr release];


-(void)handleTap{
    AVCaptureDevice *device = [[self captureInput] device];

    NSError *error;

     if ([device isFocusModeSupported:AVCaptureFocusModeAutoFocus] &&
         [device isFocusPointOfInterestSupported])
     {
         if ([device lockForConfiguration:&error]) {
             [device setFocusPointOfInterest:point];

        CGPoint point = [touch locationInView:self.cameraView];
    point.x /= self.cameraView.frame.size.width;
    point.y /= self.cameraView.frame.size.height;
    [self focusAtPoint:point];

             [device unlockForConfiguration];
         } else {
             NSLog(@"Error: %@", error);
         }
     }
}