iphone - 拍摄完图像后，UIActivityIndi​​catorView没有显示在“相机”叠加 View 上

Question

我在相机OverlayView.xib的中间有一个UIActivityIndi​​catorView。我通过反复调用 [cameraPicker takePicture] 来进行多次快照。我想在波纹管代码完成所有快照后显示指标:

- (void)didTakePicture:(UIImage *)picture {   //Called from picker didFinishPickingMediaWithInfo

   [self.capturedImages addObject:picture];
   snapsCount ++;
   if (snapsCount < noOfSnaps) {
      [cameraPicker takePicture];
   }else {
     overlayView.indicator.hidden = NO;  //Not showing indicator
     [overlayView.indicator startAnimating]; //Not working
   }
}

谁能告诉我为什么不显示的原因。
在以下情况下，我可以在进行最后一次捕捉之前显示指标，但是为什么不这样做。

if (snapsCount < noOfSnaps) {
    if (snapsCount+1 == noOfSnaps) {

       overlayView.indicator.hidden = NO;  //Show the indicator
       [overlayView.indicator startAnimating];   //Work nicely
       overlayView.userMessage.text = @"Processing";
    }
    [cameraPicker takePicture];
}

在完成所有快照之后，是否有人遇到问题并知道解决方案以显示指示器？

提前致谢。

Answer 1

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

if (snapsCount > noOfSnaps) {
overlayView.indicator.hidden = NO;  
[overlayView.indicator startAnimating];
}
[NSTimer scheduledTimerWithTimeInterval:0.3
                                 target:self 
                               selector:@selector(didTakePicture:) 
                               userInfo: [info objectForKey:UIImagePickerControllerOriginalImage] 
                                repeats:NO];
}