一个UISrcollView中多个UITextField的滚动处理

摘译自: http://stackoverflow.com/questions/484855/how-programatically-move-a-uiscrollview-to-focus-in-a-control-above-keyboard

使用一个实例变量记录视图在为键盘调整之前的位置，以用于当UITextField返回时恢复到之前的状态。

//header @interface TheViewController : UIViewController <UITextFieldDelegate> {     CGPoint svos; } //implementation - (void)textFieldDidBeginEditing:(UITextField *)textField {     svos = scrollView.contentOffset;     CGPoint pt;     CGRect rc = [textField bounds];     rc = [textField convertRect:rc toView:scrollView];     pt = rc.origin;     pt.x = 0;     pt.y -= 60;     [scrollView setContentOffset:pt animated:YES];           } - (BOOL)textFieldShouldReturn:(UITextField *)textField {     [scrollView setContentOffset:svos animated:YES];     [textField resignFirstResponder];     return YES; }