Question

我正在开发一个IOS应用程序。我正在动态创建文本字段和按钮，我希望在按钮点击时获取文本字段的文本，但我收到错误：

[UIView setText：]：无法识别的选择器发送到实例

这是我的代码：

- (IBAction)customFieldAdd:(id)sender{
    [_addfieldArray addObject:_field];

    x = 10;
    y = 10;
    for( int i = 0; i < [_addfieldArray count]; i++ ) {
        UITextField *copyfield = [[UITextField alloc]initWithFrame:CGRectMake(5.0, x + _field.frame.size.height, 195.0f, 30.0f)];
        [copyfield setDelegate:self];
        [copyfield setTag:i];
        [_filterPossibleValueView addSubview:copyfield];
        x = x+_field.frame.size.height+10;

        UIButton *copyAddButton = [[UIButton alloc]initWithFrame:CGRectMake(202.0f, y + _addField.frame.size.height, 30.0f, 30.0f)];
        [copyAddButton setTag:i];
        [copyAddButton addTarget:self action:@selector(customFieldDelete:) forControlEvents:UIControlEventTouchUpInside];
        [_filterPossibleValueView addSubview:copyAddButton];
        y = y+_addField.frame.size.height+10;

        count++;
    }
}

- (IBAction)customFieldDelete:(id)sender{
    UIButton *button = (UIButton*)sender;
    NSInteger index = button.tag;
//   [_addfieldArray removeObjectAtIndex:index];

    UITextField *field = [_filterPossibleValueView viewWithTag:index];
    NSString *myText = field.text;
}

Answer 1

The default value for the tag property is 0，您将该值设置为其中一个文本字段。因此，当您尝试使用tag == 0获取视图时，它将包含多个带有该标记的视图。

设置标记时应使用偏移量：

[copyfield setTag:kOffset + i];
...
[copyAddButton setTag:kOffset*2 + i]; // note that the button and the text field should not have the same tag either

其中kOffset的定义（例如）如下：

let kOffset: Int = 1000

然后，要获取文本字段的文本，您可以使用：

NSInteger tag = button.tag - kOffset;
UITextField *field = [_filterPossibleValueView viewWithTag:tag];
NSString *myText = field.text;

获取按钮上的TextField文本单击

1 个答案: