如何在UITableView中滚动时隐藏/显示图像？

Question

I'm new to iOS programming and i want to learn something about UITableView.

I have some images in UITableViewCell. I want to hide my images when scrolling start then i want to show them when scrolling stop.

How can i do that ? Is there a method or something else about that ?

Answer 1

UITableView inherits from UIScrollView, thus you can in your tableView delegate receive UIScrollViewDelegate callbacks.

Implement the delegate method

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

which tells the delegate when the scroll view is about to start scrolling the content.

and

- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset

which tells the delegate when the user finishes scrolling the content.

Read the ScrollViewDelegate Reference .

Answer 2

你只需要实现scrollview委托方法就可以知道滚动何时停止，然后设置一个bool值并重新加载表，并根据bool值你可以显示和隐藏图像。当滚动开始时将bool设置为NO 。