ios - 当我单击 Objective C 中的按钮时，为什么未从 tableViewCell 获取文本字段数据？

Question

如果我点击按钮 NSLog 显示 NULL 值，它没有从文本字段获取数据，为什么？......

委托(delegate)方法正常工作................................................

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  UITableViewCell *cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"cellID"];
  if (indexPath.row == 0) {
    self.nameTextField = [[UITextField alloc]init];
    self.nameTextField.frame =CGRectMake(25, 0, 300, 50);
    self.nameTextField.placeholder = @"Name";
    self.nameTextField.keyboardType = UIKeyboardTypeAlphabet;
    [cell addSubview:self.nameTextField];
    self.nameTextField.delegate = self;

  return cell;
 }
  if (indexPath.row == 1) {

    self.button = [UIButton buttonWithType:UIButtonTypeSystem];
    self.button.frame = CGRectMake(100, 10, 135, 50);
    [self.button setTitle:@"StoreData" forState:UIControlStateNormal];
    [self.button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [cell addSubview:self.button];

    return cell;
  }

 return nil;
}

-(void)buttonClicked:(id) sender {

  if (sender == self.phoneTextField) {

    self.nameString = self.nameTextField.text;
  }

  NSLog(@"Name : %@", self.nameString);
}

Answer 1

Action 函数中的参数是按钮而不是textField

-(void)buttonClicked:(id) sender {
    if (sender == self.button) {
        self.nameString = self.nameTextField.text;
      }
  NSLog(@"Name : %@", self.nameString);
}