Swift 3选择器的使用

Question

我有这段代码，是从Swift o 3的旧版本转换而来的.

func ownCatalogBackButton() {
  // ...
}

和我在同一班的其他地方

outletScoresDetailsNav.leftBarButtonItem = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.ownCatalogBackButton(_:)));

但我错了

类型'ViewControllerScoresDetails‘的值没有成员ownCatalogBackButton

为了防止我误解了没有任何参数的函数的选择器语法，我也尝试过：

outletScoresDetailsNav.leftBarButtonItem = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.ownCatalogBackButton()));

outletScoresDetailsNav.leftBarButtonItem = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.ownCatalogBackButton(:)));

outletScoresDetailsNav.leftBarButtonItem = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.ownCatalogBackButton(_)));

我的大脑必须在修复了第一个1500个问题后才能转换.造成这一错误的原因是什么？

Answer 1

试着用这个：

outletScoresDetailsNav.leftBarButtonItem = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.ownCatalogBackButton));