ios - Swift 3 循环 JSON 数据

Question

我正在尝试遍历一个 JSON 数组，将数据发送到一个结构。

这是我使用 SwiftyJSON 返回 JSON 对象的代码:

performAPICall() {
    json in
    if(json != nil){
    print("Here is the JSON:")
    print(json["content"]["clients"])

        let clients = json["content"]["clients"]
        for client in clients {
            var thisClient = Client()
            thisClient.id = client["id"].string
            thisClient.desc = client["desc"].string
            thisClient.name = client["name"].string
            self.clientArray.append(thisClient)
    }
    self.tableView.reloadData()
    } else {
        print("Something went very wrong..,")
    }
}

我不太确定为什么我在三个字符串上收到“没有下标”错误。

感谢任何帮助，谢谢。

编辑:这是一个 JSON 示例

{
    "content": {
        "clients": [{
            "group": "client",
            "id": "group_8oefXvIRV4",
            "name": "John Doe",
            "desc": "John's group."
        }, {
            "group": "client",
            "id": "group_hVqIc1eEsZ",
            "name": "Demo Client One",
            "desc": "Demo Client One's description! "
        }, {
            "group": "client",
            "id": "group_Yb0vvlscci",
            "name": "Demo Client Two",
            "desc": "This is Demo Client Two's group"
        }]
    }
}

Answer 1

您应该使用array 方法。因此，你的行

let clients = json["content"]["clients"]

应该使用array(并安全地展开它):

guard let clients = json["content"]["clients"].array else {
    print("didn't find content/clients")
    return
}

// proceed with `for` loop here