使用dismissViewControllerAnimated：完成：

Question

我使用的一些代碼使用已棄用的方法dismissModalViewControllerAnimated。該文檔說現在使用dismissViewControllerAnimated:completion:。我不確定completion:部分。在我的情況下應該完成nil或NULL還是什麼？

原始代碼如下。

- (void)didFinishWithCamera 
{ 
    [self dismissModalViewControllerAnimated:YES]; 

    if ([self.capturedImages count] > 0) 
    { 
     if ([self.capturedImages count] == 1) 
     { 
      // we took a single shot 
      [self.imageView setImage:[self.capturedImages objectAtIndex:0]]; 
     } 
     else 
     { 
      // we took multiple shots, use the list of images for animation 
      self.imageView.animationImages = self.capturedImages; 

      if (self.capturedImages.count > 0) 
       // we are done with the image list until next time 
       [self.capturedImages removeAllObjects]; 

      self.imageView.animationDuration = 5.0; // show each captured photo for 5 seconds 
      self.imageView.animationRepeatCount = 0; // animate forever (show all photos) 
      [self.imageView startAnimating]; 
     } 
    } 
} 

Answer 1

如果你不關心完成，然後提供一個空塊：

[self dismissModalViewControllerAnimated:YES 
           completion:^(void){}];