selector - #selector inside object extension - 未解析的标识符

Question

使用 Swift 的新 2.2 版本，我不能使用#selector调用在（相同）扩展的扩展中定义的方法。编译器说unresolved itendifier for doSomething(_:).

extension UIViewController {

func doSomething(){
    //...
}

func setTapGestureRecognizer(){
    let recognizer = UITapGestureRecognizer(target: self, action: #selector(doSomething(_:))) //unresolved itendifier 
    view.addGestureRecognizer(recognizer )
}

}

我已经尝试doSomething()用@objc没有成功的方法标记该方法。

Answer 1

您的 func 没有输入参数。将其修复为：

func setTapGestureRecognizer(){
    let recognizer = UITapGestureRecognizer(target: self, action: #selector(doSomething))
    view.addGestureRecognizer(recognizer)
}