SwitUI 从 API 地理编码 google 获取 JSON 结果

Question

我必须从地理编码 goodle API 获取 JSON 结果。

JSON 结果：

{
"plus_code" : {
"compound_code" : "2V6X+23 Ostritz, Germania",
"global_code" : "9F3P2V6X+23"
},
"results" : [
{
"address_components" : [
{
"long_name" : "Unnamed Road",
"short_name" : "Unnamed Road",
"types" : [ "route" ]
},
{
"long_name" : "Ostritz",
"short_name" : "Ostritz",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Görlitz",
"short_name" : "GR",
"types" : [ "administrative_area_level_3", "political" ]
},
{
"long_name" : "Dresden",
"short_name" : "DD",
"types" : [ "administrative_area_level_2", "political" ]
}
],
"formatted_address" : "Unnamed Road, 02899 Ostritz, Germania",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 51.0103607,
"lng" : 14.898013
},
"southwest" : {
"lat" : 51.0093767,
"lng" : 14.8962029
}
},
"location" : {
"lat" : 51.0097477,
"lng" : 14.8972969
},
"location_type" : "GEOMETRIC_CENTER",
"viewport" : {
"northeast" : {
"lat" : 51.01121768029149,
"lng" : 14.8984569302915
},
"southwest" : {
"lat" : 51.0085197197085,
"lng" : 14.8957589697085
}
}
},
"place_id" : "ChIJ6egabgkhCUcRznhL6gAPj_w",
"types" : [ "route" ]
},
{
"address_components" : [
{
"long_name" : "Ostritz",
"short_name" : "Ostritz",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Circondario di Görlitz",
"short_name" : "GR",
"types" : [ "administrative_area_level_3", "political" ]
},
{
"long_name" : "Dresda",
"short_name" : "DD",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Sassonia",
"short_name" : "SN",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Germania",
"short_name" : "DE",
"types" : [ "country", "political" ]
}
],
"formatted_address" : "Ostritz, Germania",
"geometry" : {
"bounds" : {
"northeast" : {
"lat" : 51.06239919999999,
"lng" : 14.964849
},
"southwest" : {
"lat" : 50.9721983,
"lng" : 14.87143
}
},
"location" : {
"lat" : 51.01573639999999,
"lng" : 14.9314311
},
"location_type" : "APPROXIMATE",
"viewport" : {
"northeast" : {
"lat" : 51.06239919999999,
"lng" : 14.964849
},
"southwest" : {
"lat" : 50.9721983,
"lng" : 14.87143
}
}
},
"place_id" : "ChIJKfHi7N8gCUcR2V02pmCO3mU",
"types" : [ "locality", "political" ]
},
........ 
........
],
"status" : "OK"
}

型：

import Foundation
struct Postgeo: Codable {
let plus_code: Plus_code
let results: [Results]
let status: String
}
struct Results: Codable {
let address_components: [Address_components]
let formatted_address: String
let geometry: Geometry
let place_id: String
let plus_code: Plus_coderes
let types: [String]
}
struct Geometry: Codable {
let location: Location
let location_type: String
let viewport: Viewport
}
struct Plus_code: Codable {
let compound_code, global_code: String
}
struct Address_components: Codable {
let long_name, short_name: String
let types: [String]
}
struct Location: Codable {
let lat, lng: Double
}
struct Northeast: Codable {
let lat, lng: Double
}

APIManage：

import Foundation
import Combine
class APIManager: ObservableObject {
let objectWillChange = PassthroughSubject<Void, Never>()

var postgeos = Postgeo.self {
willSet {
objectWillChange.send()
}
}
init() {
guard let url = URL(string: "<url>") else {
fatalError("Invalid URL")
}
URLSession.shared.dataTask(with: url) { data, response, error in
guard let json = data else { return }
let postgeo = try? JSONDecoder().decode(Postgeo.self, from: json)
print(postgeo)
DispatchQueue.main.async {
self.postgeos = postgeo
}
print("API values fetched Successfully")
}.resume()
}
}

在调试时，我有错误：

无法将类型"Postgeo

？"的值分配给类型"Postgeo.Type">

在第self.postgeos = postgeo行

如果我评论这一行，我有正确的结果来自print(postgeo)

我已经为 swiftui 改编了一个 Json 获取代码，该代码适用于以"["开头的 Json，但地理编码谷歌 API 的结果 json 以"{"开头。

如何修复此错误？

谢谢。

Answer 1

如果print(postgeo)显示正确的结果，则postgeos导致问题。

事实上，你宣布postgeos是Postgeo.self.

删除.self，添加?并将=替换为:

var postgeos : Postgeo? { ...