如何在Swift中使用一个IBAction用于多个按钮？ [英] How to use one IBAction for multiple buttons in Swift?

问题描述

我有多个按钮，每个按钮都可以切换应用程序的语言。而不是必须为每个按钮创建多个IBAction是否有办法让它们都连接到一个IBAction并根据按下的按钮更改语言？我认为在这种情况下使用switch语句会很好，但不能确定如何设置它。

I have multiple buttons each one with the ability to switch the language of the app. Instead of having to create multiple IBActions for each button is there a way to have them all connected to one IBAction and change the language based on the button pressed? I'm thinking a switch statement would be good to use in this situation but not exactly sure how to set it up.

推荐答案

在Interface Builder中，选择Attributes Inspector并为每个按钮设置一个唯一编号的Tag，然后您可以执行以下操作：

In Interface Builder, select the Attributes Inspector and set the Tag for each button with a unique number, then you can do something like this:

@IBAction changeLanguage(sender: AnyObject) {
    guard let button = sender as? UIButton else {
        return
    }

    switch button.tag {
    case 1:
        // Change to English
    case 2:
        // Change to Spanish
    case 3:
        // Change to French, etc
    default:
        print("Unknown language")
        return
    }
}

将动作连接到多个按钮：在Interface Builder中，右键单击视图层次结构中的ViewController，然后单击鼠标左键以将操作连接拖动到每个按钮。

To connect the action to multiple buttons: in Interface Builder, right-click ViewController in the view hierarchy, then left-click to drag the action connection to each button.

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