Question

我从Swift o version 3的旧版本转换后有了这段代码......

func ownCatalogBackButton() {
  // ...
}

我在同一个班级的其他地方

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

但我收到错误

“ViewControllerScoresDetails”类型的值没有成员 ownCatalogBackButton

以防万一我误解了没有任何参数的函数的选择器语法，我也试过了：

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(_)));

转换后修复前1500个问题后，我的大脑必须被炒掉......这可能是造成这个错误的原因？

Answer 1

试试这个：

min-width

Swift 3选择器使用

1 个答案: