无法使用 SwiftyJSON 访问 JSON 数据

Question

我正在尝试访问一些JSON数据，但我无法使用swiftyJSON访问这些数据。我正在返回 JSON 响应，所以我使用 alamofire 获取它。这是 JSON：

{"groupID":"6","groupName":"Test","teacher":"teacher1 
","teacherID":"13","Locations": 
[{"locationID":"5","locationName":"field"}, 
{"locationID":"6","locationName":"34th"}],"Error":""}

我正在使用打印语句来调试问题所在。这是我尝试使用的代码：

let json = JSON(response.result.value ?? "error")
//let jsonError = json["Error"]
print("=================<JSON RESPONSE>=================");
print(json)
print("=================</JSON RESPONSE/>=================");
self.groupID = json["groupID"].stringValue
self.groupName = json["groupName"].stringValue
self.teacherID = json["teacherID"].stringValue
let locjson = json["Locations"]

print("Entering LocJSON Loop")
print("=================<LOCJSON >=================");
print("GNAME:" +  self.groupID)
print("TID: " + json["teacherID"].stringValue)
print("Locjson.stringalue: " + locjson.stringValue)

//print("LocationJSON" + json["Locations"]);
print("=================</LOCJSON/>=================");
for (key, object) in locjson {
print("In LocJSON Loop")
let locationIDVar: Int? = Int(key)
self.locations[locationIDVar!].locationID = locationIDVar!
self.locations[locationIDVar!].locationName = object.stringValue
print(self.locations[locationIDVar!].locationName)
print(object);
}

下面是与打印语句对应的控制台输出。

=================<JSON RESPONSE>=================
{"groupID":"6","groupName":"Test","teacher":"Teacher1"         
,"teacherID":"13","Locations": 
[{"locationID":"5","locationName":"field"}, 
{"locationID":"6","locationName":"34th"}],"Error":""}
=================</JSON RESPONSE/>=================
Entering LocJSON Loop
=================<LOCJSON >=================
GNAME:
TID: 
Locjson.stringalue: 
=================</LOCJSON/>=================

另外，如何访问"位置"内的多个位置？

Answer 1

键Locations的值是一个包含字典的数组。

let locjson = json["Locations"].arrayValue
for location in locjson {
let locID = location["locationID"].stringValue
let locName = location["locationName"].stringValue
print(locID, locName)
}

在 Swift 4 中，我更喜欢Decodable而不是 SwiftyJSON，因为您可以直接解码为结构。