swift 3.0 如何在 Swift 3 的 `Any` 中访问 `AnyHashable` 类型? [英] swift 3.0 How can I access `AnyHashable` types in `Any` in Swift 3?

问题描述

我正在使用 sqlite 文件从 authorId 获取 diaryEntriesTeacher.当我打印变量 authorId 为 nil 时，它生成以下 authorId 对象代码:-

I'm using sqlite file to get the diaryEntriesTeacher from the authorId. it generates the following object of authorId when I print the variable authorId is nil Code :-

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()
}

输出

推荐答案

This is how you access Dictionary of [AnyHashable : Any]

This is how you access Dictionary of [AnyHashable : Any]

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

就你而言

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

这篇关于swift 3.0 如何在 Swift 3 的 `Any` 中访问 `AnyHashable` 类型?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！