我们可以通过编程方式将iPhone照片库滚动到底部

Question

在我的应用程序中，我需要从照片库中选择图像，我有数百张照片。问题是Camera拍摄的最新照片，保存在照片库的底部，因此，我必须向下滚动以选择我拍摄的最新照片。有什么办法可以将ImagePickerViewController的视图滚动到底部，还是可以将最新的图片存储在顶部？

Answer 1

[self presentViewController:imagePickerController animated:YES completion:^()
        {
               UIView *imagePickerView = imagePickerController.view;
               UIView *view = [imagePickerView hitTest:CGPointMake(5,5) withEvent:nil];
               while (![view isKindOfClass:[UIScrollView class]] && view != nil)
               {
                    view = [view superview];
               }
               if ([view isKindOfClass:[UIScrollView class]])
               {
                   UIScrollView *scrollView = (UIScrollView *) view;
                   CGPoint contentOffset = scrollView.contentOffset;
                   CGFloat y = MAX(contentOffset.y, [scrollView contentSize].height-scrollView.frame.size.height);
                   CGPoint bottomOffset = CGPointMake(0, y);
                   [scrollView setContentOffset:bottomOffset animated:YES];
               }
       }];