After deleting the UITableViewCell , a blank row appeared

First,I customized the UITableViewCell and put a new label into it；

Then I swiped the row and deleted it (not the last one), and it to be deleted. unfortuna开发者_JS百科tely，the last one moved down and covered the new one appeared in the window,but leave a blank row, just like the image below;

Make sure that:

1. numberOfRowsInSection is properly implemented - maybe you are getting the number of rows from an [array count] that still has the NSString in question;
2. You are calling reloadData