Question

我有来自socket io库的响应，有这样的响应

socket.on("response-names") { data, ack in
    print(data)
}

可以打印这个，

[{
    "person": [{
        "_id":"56512323212132",
        "name":"John Smith",
        "id":"0000001",
        "geolocation":{
             "latitude":5.12312323443,
             "longitude":101.12312464564354
        }
     }]
}]

你们如何在swift中访问名称，id和地理位置（lat，long）？，

据我所知，数据是NSArray。但访问是数据[0]将产生零。但我可以做data.count，它将以1返回。

谢谢

Answer 1

最后我解决了这个问题，仅供其他人参考。在解析之前，您似乎需要知道类型。并打印检查。并且调试代码确实很有用，像NSCFArray之类的东西意味着您的数据为NSArray，并尝试从中读取。

let dataArray = data as NSArray

let dataString = dataArray[0] as! String
let dataNewNow = dataString.data(using: String.Encoding.utf8, allowLossyConversion: false)!
do {
    let json = try NSJSONSerialization.JSONObjectWithData(dataNewNow, options: []) as! [String: AnyObject]

    let str = json["person"] as! NSArray
    let str2 = str[0] as! NSDictionary

    let personName = str2["name"] as! String
    let personId = str2["id"] as! String

    let personGeoLocation = str2["geolocation"] as! NSDictionary
    let personLatitude = personGeoLocation["latitude"] as! NSNumber
    let personLongitude = personGeoLocation["longitude"] as! NSNumber

    print("personName =", personName)
    print("personID =", personId)
    print("Person Latitude =", personLatitude)
    print("Person Longitude =", personLongitude)

} catch let error as NSError {
    print("Failed to load: \(error.localizedDescription)")
}

Answer 2

在我的情况下，这工作

let dataArray = data as NSArray
let dataString = dataArray[0] as! String
let dataNewNow = dataString.data(using: String.Encoding.utf8, allowLossyConversion: false)!
do {
    let json = try JSONSerialization.jsonObject(with: dataNewNow, options: []) as! [String: AnyObject]
    let nMsgType = json["msg_type"] as! String
    print(nMsgType)

} catch let error as NSError {
    print("Failed to load: \(error.localizedDescription)")
}

从socket.io响应swift解析数据

2 个答案: