为UISegmentedControl定义单击事件 [英] Define click event for UISegmentedControl

问题描述

我在我的应用程序中添加了 UISegmentedControl 。在正常状态下没有选择任何按钮。我希望在选择第一个段时实现按钮单击事件，并在单击另一个按钮时实现另一个事件。

I have added a UISegmentedControl in my application. None of the buttons are selected in normal state. I want to implement a button click event when the first segment is selected, and another event when another button is clicked.

推荐答案

如果我理解你的问题，你只需要实现一个目标 - 动作方法（由 UIControl 这是 UISegmentedControl 的父类），用于常量 UIControlEventValueChanged ，与UISegmentControl的参考文档中给出的示例完全相同。

If I understand your question correctly, you simply have to implement a target-action method (supported by UIControl which is UISegmentedControl's parent class) for the constant UIControlEventValueChanged, exactly like in the example given in UISegmentControl's reference documentation.

ie

[segmentedControl addTarget:self
                     action:@selector(action:)
           forControlEvents:UIControlEventValueChanged];

用于带有以下签名的邮件：

used for a message with the following signature:

- (void)action:(id)sender

或

[segmentedControl addTarget:self
                     action:@selector(action:forEvent:)
           forControlEvents:UIControlEventValueChanged];

- (void)action:(id)sender forEvent:(UIEvent *)event

或

[segmentedControl addTarget:self
                     action:@selector(action)
           forControlEvents:UIControlEventValueChanged];

最简单的方法：

- (void)action

这是标准类型的目标动作UIKit中使用的选择器。

which are standard types of target-action selectors used in UIKit.

这篇关于为UISegmentedControl定义单击事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！