swift请教这两语句有什么区别？

问题描述

问 题

    func hideKeyboardWhenTappedAround() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
        view.addGestureRecognizer(tap)
    }
    
    func dismissKeyboard() {
        view.endEditing(true)
    }
}

请教上面语句中#selector(UIViewController.dismissKeyboard)和#selector(dismissKeyboard)有什么区别吗？我都能正常运行的啊！

解决方案

你可以这样理解：

#selector(dismissKeyboard) 等价于 #selector(self.dismissKeyboard) 等价于 #selector(UIViewController.dismissKeyboard)

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