'#selector'的参数不是指'@objc'方法，属性或初始值设定项 [英] Argument of '#selector' does not refer to an '@objc' method, property, or initializer

问题描述

我在Swift 3中使用Objective-C编写了一个 UIButton 子类。

I sublcassed in Swift 3 a UIButton subclass that is written in Objective-C.

当我尝试要添加目标，它会失败并显示错误代码：

When I try to add a target, it fails with an error code:

class ActionButton: JTImageButton {

    func action() {

    }

    func configure()) {
        // ...
        self.addTarget(self, action: #selector(self.action()), for: .touchUpInside)
        // error: 
        // Argument of '#selector' does not refer to an '@objc' method, property, or initializer

    }
}

推荐答案

您所要做的就是将func标记为 @objc ，并且不需要 self 引用或括号

All you have to do is mark the func as @objc and there's no need for the self reference or the parenthesis

class ActionButton: JTImageButton {

    @objc func btnAction() {

    }

    func configure() {
        // ...
        self.addTarget(self, action: #selector(btnAction), for: .touchUpInside)
        // error: 
        // Argument of '#selector' does not refer to an '@objc' method, property, or initializer

    }
}

您甚至可以将它设为私人如果你想要

You can even make it private if you want

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