iOS swift5 字典(Dictionary)转json字符串（String）

    func getDataDictWithArr(dictArr:[Dictionary<String, String>]) -> [String:Any]{
    
    
        var dict:[String:Any] = [:]
        dict["watchAddress"] = "F9:A0:06:69:AF:61"
        dict["datasheet"] = dictArr
        let data = try! JSONEncoder().encode(dictArr)
        let str = String(data: data, encoding: .utf8)

        return dict
    }