IOS UITableView Scroll control and return to the top

The control of the UITableView control in the Iphone/ipad development process has many interesting places, such as implementing scrolling controls common to Android and returning to the top effect, which can be achieved with the following code, but it is important to note that The parameters of the UITableView scrollrecttovisible method in the iOS SDK cannot be all 0 rect, otherwise it is invalid.

Reference code;

The code is as follows	Copy Code
CGRectMake (0, 0, 1, 1) can be returned directly to the top of the UITableView [TableView scrollrecttovisible:cgrectmake (0, 0, 1, 1) animated:no]; CGRectMake (0, 0, 0, 0) set invalid [TableView scrollrecttovisible:cgrectmake (0, 0, 0, 0) Animated:no];