如何创建或分配代理人？

发布于 2024-08-29 19:23:56 字数 313 浏览 6 评论 0原文

我如何指定代表？我有一个名为 CustomSign 的课程。该类有一个与其关联的视图。该视图有 2 个元素。一个文本字段和一个 uilabel。当您单击“完成”按钮时，我想将文本字段数据复制到 uilabel。

这是我在 CustomSign.m 中的代码我不知道如何使其成为代表。

-(void)textFieldDidEndEditing:(UITextField *)textField {
    [textField resignFirstResponder];
    label.text = textField.text;
}

原文

How do I make a delegate? I have a class called CustomSign. The class has a view associated with it. The view has 2 elements. A textfield and a uilabel. I want to copy the textfields data to the uilabel when you click the done button.

Here's my code in the CustomSign.m
I don't know how to make it a delegate.

-(void)textFieldDidEndEditing:(UITextField *)textField {
    [textField resignFirstResponder];
    label.text = textField.text;
}

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对风讲故事 2024-09-05 19:23:56

您需要引用 CustomSign.m 文件中的文本字段。这可以是您随后在 Interface Builder 中连接的插座，也可以直接存储对文本字段的引用（如果您以编程方式创建它）。

然后，您可以调用文本字段的 -setDelegate: 方法将您的对象指定为委托：

//in CustomSign.m
- (void)awakeFromNib
{
    //assume textField is an ivar that is connected to the textfield in IB
    [textField setDelegate:self];
}

您还可以在 Interface Builder 中通过按住 Control 键将文本字段拖到您的对象上来设置文本字段的委托。目的。

请注意，您不应自己调用 -resignFirstResponder。

You need to have a reference to the text field in your CustomSign.m file. This can either be an outlet which you then connect up in Interface Builder, or you can store a reference to the text field directly if you're creating it programmatically.

You then call the -setDelegate: method of the text field to assign your object as the delegate:

//in CustomSign.m
- (void)awakeFromNib
{
    //assume textField is an ivar that is connected to the textfield in IB
    [textField setDelegate:self];
}

You can also set the delegate of the text field in Interface Builder by control-dragging from the text field to your object.

Note that you should not call -resignFirstResponder yourself.

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