swift - 删除强制展开

Question

去除强制展开

private func getLanguageCode() -> String {
    return Locale.current.languageCode!
}

去除力展开后

private func getLanguageCode() -> String? {
    if let language = Locale.current.languageCode {
       return language
    }
    return nil
}

正确??

为此

lazy var commonErrorList : Dictionary<String, AnyObject>? = {
        let path = Bundle.main.path(forResource: "CommonErrorCodes", ofType: "plist")
        return NSDictionary(contentsOfFile: path!) as? [String : AnyObject]
    }() 

去除强制展开后应该是什么？

Answer 1

你可以

return Locale.current.languageCode 

没有强制解包，如果你只是返回 nil。