ios - 来自自定义类问题的 UIKeyboardWillShowNotification

Question

我有一个带有文本字段的自定义 UITableViewCell。单元格的文本字段设置为调用委托函数。里面

  -(BOOL)textFieldShouldReturn:(UITextField *)textField{

                 [[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];

                  [[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];



                   if(textField == fromTF){

                        fromTF.text = [[[fromTF.text substringToIndex:2] stringByAppendingString:@":"] stringByAppendingString:[fromTF.text substringFromIndex:2]];
                        [toTF becomeFirstResponder];
                        return YES;
                    }
                    if(textField == toTF){
                        [toTF resignFirstResponder];
                        [intTF becomeFirstResponder];
                        return YES;

                      }

             return YES;
} 

这是在我的自定义单元格中调用的委托方法。但是，在调用时，按下“返回”键时不会删除 UIKeyBoardWillHideNotification addobserver 对象。有没有办法解决这个问题？

Answer 1

像这样试试

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{

  [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

并检查此链接textFieldShouldBeginEditing + UIKeyboardWillShowNotification + OS 3.2

它可能会帮助你。

Answer 2

你好 Ganesh 谢谢你的回答。我删除了 resignFirstResponder 并将 firstResponder 直接传递给下一个文本字段。这可以防止键盘消失。