|
| 1 | +// |
| 2 | +// ContentView.swift |
| 3 | +// SwiftUI-Weather |
| 4 | +// |
| 5 | +// Created by 杨帆 on 2020/3/24. |
| 6 | +// Copyright © 2020 杨帆. All rights reserved. |
| 7 | +// |
| 8 | + |
| 9 | +import SwiftUI |
| 10 | +import Combine |
| 11 | +import Foundation |
| 12 | + |
| 13 | +// Model层 |
| 14 | +// MARK: - Model |
| 15 | +struct Weather: Codable, Hashable, Identifiable { |
| 16 | + let id = UUID() |
| 17 | + let reason: String |
| 18 | + let result: Result |
| 19 | + let errorCode: Int |
| 20 | + |
| 21 | + enum CodingKeys: String, CodingKey { |
| 22 | + case reason, result |
| 23 | + case errorCode = "error_code" |
| 24 | + } |
| 25 | +} |
| 26 | + |
| 27 | +// MARK: - Result |
| 28 | +struct Result: Codable, Hashable, Identifiable { |
| 29 | + let id = UUID() |
| 30 | + let city: String |
| 31 | + let realtime: Realtime |
| 32 | + let future: [Future] |
| 33 | +} |
| 34 | + |
| 35 | +// MARK: - Future |
| 36 | +struct Future: Codable, Hashable, Identifiable { |
| 37 | + let id = UUID() |
| 38 | + let date, temperature, weather: String |
| 39 | + let wid: Wid |
| 40 | + let direct: String |
| 41 | +} |
| 42 | + |
| 43 | +// MARK: - Wid |
| 44 | +struct Wid: Codable, Hashable, Identifiable { |
| 45 | + let id = UUID() |
| 46 | + let day, night: String |
| 47 | +} |
| 48 | + |
| 49 | +// MARK: - Realtime |
| 50 | +struct Realtime: Codable, Hashable, Identifiable { |
| 51 | + let id = UUID() |
| 52 | + let temperature, humidity, info, wid: String |
| 53 | + let direct, power, aqi: String |
| 54 | +} |
| 55 | + |
| 56 | + |
| 57 | + |
| 58 | + |
| 59 | +// Network层 |
| 60 | +// 一个类专门用于负责API网络请求 |
| 61 | +class API { |
| 62 | + // 每一个网络请求创建一个方法，参数为接收到的数据的逃逸闭包，这里数据为模型数组 |
| 63 | + func getWeather(completion: @escaping ([Future]) -> ()) { |
| 64 | + guard let url = URL(string: "http://apis.juhe.cn/simpleWeather/query?city=%E8%8A%9C%E6%B9%96&key=25ca0b78d78b2dc7761bc2e4af6d82fc") |
| 65 | + else { return } |
| 66 | + |
| 67 | + URLSession.shared.dataTask(with: url) { (data, _, _) in |
| 68 | + guard let data = data else { return } |
| 69 | + // 转Model |
| 70 | + let weather = try! JSONDecoder().decode(Weather.self, from: data) |
| 71 | + DispatchQueue.main.async { |
| 72 | + completion(weather.result.future) |
| 73 | + } |
| 74 | + } |
| 75 | + .resume() |
| 76 | + } |
| 77 | +} |
| 78 | + |
| 79 | +// Data层 |
| 80 | +// 利用Combine完成数据的绑定 |
| 81 | +class DataStore: ObservableObject { |
| 82 | + |
| 83 | + @Published var weathers: [Future] = [] |
| 84 | + |
| 85 | + init() { |
| 86 | + fetchBooks() |
| 87 | + } |
| 88 | + |
| 89 | + func fetchBooks() { |
| 90 | + API().getWeather { (weathers) in |
| 91 | + self.weathers = weathers |
| 92 | + } |
| 93 | + } |
| 94 | +} |
| 95 | + |
| 96 | +// View层 |
| 97 | +struct ContentView: View { |
| 98 | + |
| 99 | + @ObservedObject var store = DataStore() |
| 100 | + |
| 101 | + var body: some View { |
| 102 | + NavigationView { |
| 103 | + // 没有数据时显示正在加载 |
| 104 | + if store.weathers.count == 0 { |
| 105 | + |
| 106 | + Text("数据加载中") |
| 107 | + .font(.title) |
| 108 | + .foregroundColor(.orange) |
| 109 | + .navigationBarTitle("数据展示") |
| 110 | + } |
| 111 | + else{ |
| 112 | + List(store.weathers) { weather in |
| 113 | + // Row可以很复杂 |
| 114 | + Text(weather.weather) |
| 115 | + }.navigationBarTitle("数据展示") |
| 116 | + } |
| 117 | + } |
| 118 | + } |
| 119 | +} |
| 120 | + |
| 121 | +struct ContentView_Previews: PreviewProvider { |
| 122 | + static var previews: some View { |
| 123 | + ContentView() |
| 124 | + } |
| 125 | +} |
0 commit comments