swift 3.0 如何在 Swift 3 中访问“Any”中的“AnyHashable”类型？

我正在使用 sqlite 文件从authorId 获取diaryEntriesTeacher。当我打印变量authorId is nil 时，它会生成以下authorId 对象 代码 ：-

func applySelectQuery() {        
    checkDataBaseFile()
    objFMDB = FMDatabase(path: fullPathOfDB)
    objFMDB.open()
    objFMDB.beginTransaction()

    do {
        let results = try objFMDB.executeQuery("select * from diaryEntriesTeacher", values: nil)



        while results.next() {  
            let totalCount = results.resultDictionary
            let authorId = totalCount?["authorId"]! 
            print("authorId",authorId)
   }


    }
    catch {
        print(error.localizedDescription)
    }
    print(fullPathOfDB)
    self.objFMDB.commit()
    self.objFMDB.close()
}

output

这是访问字典的方式[AnyHashable : Any]

var dict : Dictionary = Dictionary<AnyHashable,Any>()
dict["name"] = "sandeep"
let myName : String = dict["name"] as? String ?? ""

在你的情况下

let authorId = totalCount?["authorId"] as? String ?? ""