问题:尝试使用包含动态对象名称的 JSON 有效负载。由于这些对象的名称不是连续的或源自模式,因此我无法使用 SwiftyJSON 遍历有效负载。动态对象的示例如下所示,以粗体表示:
“180A”:{“id”:“180A”,“标签”:“海滨之门”,“路径”:“北”,“索引”:“1”}, “195C”:{“id”:“195C” ", "label": "Dune Beach Gate", "path": "North", "index": "2" }, "211F" : { "id": "211F", "label": "日落港门", "路径": "北", "索引": "3" }
示例 JSON 有效负载:
{
"Direction": {
"NorthGates": {
"180A": {
"id": "180A",
"label": "Oceanside Gate",
"path": "North",
"index": "1"
},
"195C": {
"id": "195C",
"label": "Dune Beach Gate",
"path": "North",
"index": "2"
},
"211F": {
"id": "211F",
"label": "Sunset Harbor Gate",
"path": "North",
"index": "3"
}
}
}
}
使用 SwiftyJSON 我能够成功打印已知对象的标签,例如“180A”:
DataManager.getTopAppsDataFromFileWithSuccess { (data) -> Void in
let json = JSON(data: data)
if let gateLabel = json["Direction"]["NorthGates"]["180A"]["label"].stringValue {
//output: "Oceanside Gate"
println("NSURLSession: \(gateLabel)")
}
}
由于动态对象名称不是静态的,我无法使用上面代码中的预定义对象名称来定位标签值。以下尝试返回 nil 值:
//stringValue = nil
if let gateLabel = json["Direction"]["NorthGates"][0].stringValue {
println("NSURLSession: \(gateLabel)")
}
//stringValue = nil
if let gateLabel = json["Direction"]["NorthGates"][0]["label"].stringValue {
println("NSURLSession: \(gateLabel)")
}