JSON 中缺少部分

Question

我碰到了一堵墙，我找不到路。我有一个 JSON 文件，我正在尝试解码，但缺少一部分 JSON。即使我知道那里应该有数据，我总是得到零。

这是 JSON 文件的第一部分

{
"type": "FeatureCollection",
"name": "points",
"crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
"features": [
{ "type": "Feature", 
"properties": { "osm_id": "755", 
"name": "Majorstuen", 
"other_tags":      ""bus"=>"yes","network"=>"Ruter","public_transport"=>"stop_position"" }, 
"geometry": { "type": "Point", "coordinates": [ 10.7160479, 59.9296625 ] } },
{ "type": "Feature", 
"properties": { "osm_id": "1188", 
"name": "Arnes", 
"highway": "bus_stop", 
"other_tags": ""ref:nsrq"=>"82139"" }, 
"geometry": { "type": "Point", "coordinates": [ 16.919517, 68.3459 ] } },
{ "type": "Feature", 
"properties": { "osm_id": "1194", 
"name": "Skjellneset", 
"highway": "bus_stop", 
"other_tags": ""ref:nsrq"=>"82148"" }, 
"geometry": { "type": "Point", "coordinates": [ 16.938766, 68.34916 ] } },
{ "type": "Feature", 
"properties": { "osm_id": "1202", 
"name": "Osen", 
"highway": "bus_stop", 
"other_tags": ""ref:nsrq"=>"82152"" }, 
"geometry": { "type": "Point", "coordinates": [ 16.952982, 68.352551 ] } }
]}

这是我的结构：

struct This:Codable {
let type: String?
let name: String?
let crs: CRS
let features: [Features]
struct CRS: Codable {
let type: String?
let properties: CRSProperties
struct CRSProperties: Codable {
let name: String?
enum CodingKeys: String, CodingKey {
case name
}
}
enum CodingKeys: String, CodingKey {
case type
case properties
}
}
struct Features: Codable {
let type: String?
let properties: FeaturesProperties
struct FeaturesProperties: Codable {
let osmId: String?
let name: String?
let highway: String?
let otherTags: String?
let geo: FeaturesPropertiesGeometry?
struct FeaturesPropertiesGeometry: Codable {
let type: String
let coordinates: [Double]
enum CodingKeys: String, CodingKey {
case type
case coordinates
}
}
enum CodingKeys: String, CodingKey {
case osmId = "osm_id"
case name
case highway
case otherTags = "other_tags"
case geo = "geometry"
}
}
enum CodingKeys: String, CodingKey {
case type
case properties
}
}
}

然后这是我用来解码 JSON 的方法

guard let asset = NSDataAsset(name: "NN") else {
print("NN JSON not here")
return
}
do {
let deco = JSONDecoder()
this = try deco.decode(This.self, from: asset.data)
}catch {
print("Error: (error)")
}

我的问题是我没有将几何数据放入"this：this"。如果我从"this"打印每一行，那么"geo"的结果总是为零。

这是一条印刷线。 "功能(类型：可选("功能"(，属性：mokkingaroud。this.Features.FeaturesProperties(osmId： Optional("10587816"(， name： Optional("YX Evje"(， 高速公路： nil， otherTags： Optional("\"amenity\"=>\"fuel\"，，"\"branch\"=>\"Evje\"，\"brand\"=>\"YX\"，\"email\"=>\"[e-mail]"，\"fuel：adblue\"=>\"yes\"，\"fuel：diesel\"=>\"yes\"，\"fuel：HGV_diesel\"=>"yes"，\"fuel：octane_95\"=>"yes"，\"fuel：taxfree_diesel\"=>\"yes\"，\"hgv\"=>\"yes\"，\"phone\"=>\"[phone]"，\"ref：yx\"=>\"561\"(，geo： nil((">

请提出任何建议。

乔纳斯

Answer 1

因为coordinates不是我会使用String：

struct This:Codable {
let name, type: String?
let features: [Features]
}
struct Features: Codable {
let type: String?
let properties: [Properties]
let geometry: [Geometry]
}
struct Properties:Codable {
let name, osm_id, other_tags: String?
}
struct Geometry:Codable {
let type: String?
let coordinates: [Double]
}