UITextField 关闭键盘UITextField tftf.delegate self//实现重写了textFieldShouldReturn:方法-(BOOL)
UITextField 关闭键盘
UITextField tf;tf.delegate = self;//实现重写了textFieldShouldReturn:方法-(BOOL)textFieldShouldReturn:(UITextField *)textField{ [textField resignFirstResponder]; return YES;}