为什么我不能在Xcode中创建动作？ [英] Why can't I create an Action in Xcode?

问题描述

当我按照如何在Xcode 4.3.1中的类中添加动作或插座？，或Apple的First iOS App教程，Action没有选项。只有插座和插座连接选项。我在做什么错了？

When I follow the instructions at How do I add an action or outlet to a class in Xcode 4.3.1?, or Apple's First iOS App tutorial, there's no option for Action. There is only options for Outlet and Outlet Connections. What am I doing wrong?

推荐答案

您只能将操作连接到 UIControl 的子类。

You can connect actions only to subclasses of UIControl.

您尝试通过 UIView 创建操作，而不是UIControl的子类，没有动作。

You are trying to create an action from a UIView, which is not a subclass of UIControl and does not have actions.

从按钮而不是主视图开始拖动

Start the drag from the button, and not the "main view"

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