from:http://stackoverflow.com/questions/18388429/uitableview-is-starting-with-an-offset-in-ios-7

From iOS7 transition guide:

If you don’t want a scroll view’s content insets to be automatically adjusted, set automaticallyAdjustsScrollViewInsets to NO. (The default value of automaticallyAdjustsScrollViewInsets is YES.)

如果使用storyboard：

Go to the storyboard/xib in IB and untick the show content under nav bar stuff.