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@protocol UITextFieldDelegate <NSObject> @optional - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField; // return NO to disallow editing. - (void)textFieldDidBeginEditing:(UITextField *)textField; // became first responder - (BOOL)textFieldShouldEndEditing:(UITextField *)textField; // return YES to allow editing to stop and to resign first responder status. NO to disallow the editing session to end - (void)textFieldDidEndEditing:(UITextField *)textField; // may be called if forced even if shouldEndEditing returns NO (e.g. view removed from window) or endEditing:YES called - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string; // return NO to not change text - (BOOL)textFieldShouldClear:(UITextField *)textField; // called when clear button pressed. return NO to ignore (no notifications) - (BOOL)textFieldShouldReturn:(UITextField *)textField; // called when ‘return‘ key pressed. return NO to ignore. @end
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原文地址:http://www.cnblogs.com/mosuyanxue/p/4818812.html