如何在 Swift 中为多个按钮使用一个 IBAction? [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.不必为每个按钮创建多个 IBAction，有没有办法将它们全部连接到一个 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，然后你可以这样做:

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
    }
}

要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，然后单击左键将动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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