斯威夫特3選擇使用

Question

我有這樣的代碼，而從舊版本的雨燕O版本3轉換...

func ownCatalogBackButton() { 
    // ... 
} 

而在同一類的其他地方我有

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

，但我得到的錯誤類型的

值 'ViewControllerScoresDetails' 沒有構件 ownCatalogBackButton

以防萬一，我誤解了功能選擇語法沒有我也試過任何參數：

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(_))); 

我的大腦必須固定在轉換時第1500個問題後炒，有什麼能這個錯誤的原因？

Answer 1

嘗試這樣的：

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