UIBarButtonItem - '#selector'的参数不能引用本地函数 - Swift 3

Question

我在创建一个可以调用handleSearch函数的导航按钮时遇到问题.我收到一条消息Argument of '#selector' cannot refer to local function.任何帮助,将不胜感激!

override func viewDidLoad() {
   // various code

   func setupNavBarButtons() {
       let searchImage = UIImage(named:"search_icon")
       let searchBarButtonItem = UIBarButtonItem(image: searchImage, style: .plain, target: self, action: #selector(handleSearch(sender:)))
        navigationItem.rightBarButtonItems = [searchBarButtonItem]

    }

    func handleSearch(sender: UIBarButtonItem) {
        print(123)
    }
}

Answer 1

#selector 只能引用顶级函数,而不是本地函数(一个在另一个函数内).

简单地handleSearch移出,viewDidLoad您的问题将得到解决.