Created
December 21, 2019 04:37
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SwiftUI_Combine
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import Combine | |
import SwiftUI | |
struct ContentView: View { | |
@ObservedObject var viewModel = OrientationModel() | |
var body: some View { | |
let first = Restaurant(id: 0 ,score: 0.0, login: "a") | |
let second = Restaurant(id: 1 ,score: 0.0, login: "b") | |
let third = Restaurant(id: 2 ,score: 0.0, login: "c") | |
let restaurants = [first, second, third] | |
if !viewModel.users.isEmpty { | |
return List(viewModel.users) { restaurant in | |
RestaurantRow(restaurant: restaurant, model: self.viewModel) | |
.onAppear { | |
self.viewModel.fetchImage(for: restaurant) | |
} | |
} | |
} else { | |
return List(restaurants) { restaurant in | |
RestaurantRow(restaurant: restaurant, model: self.viewModel) | |
.onAppear { | |
self.viewModel.fetchImage(for: restaurant) | |
} | |
} | |
} | |
} | |
} | |
struct ContentView_Previews: PreviewProvider { | |
static var previews: some View { | |
ContentView() | |
} | |
} | |
struct Restaurant: Hashable, Identifiable, Decodable { | |
var id: Int64? = nil | |
var score: Double | |
var login: String? = nil | |
var avatar_url: URL? = nil | |
} | |
struct RestaurantRow: View { | |
var urlPath = "https://api.github.com/search/users" | |
var restaurant: Restaurant | |
@ObservedObject var model: OrientationModel | |
var body: some View { | |
Text("GitHub login Name \(String(describing: restaurant.login == "" ? "" : restaurant.login!))" + | |
"\n" + | |
"GitHub Score \(String(describing: self.restaurant.score.description == "" ? "" : self.restaurant.score.description))") | |
.onTapGesture { | |
// API Something | |
if self.restaurant.id == 0 { | |
self.model.search(urlPath: self.urlPath, name: self.restaurant.login ?? "") | |
} else if self.restaurant.id == 1 { | |
self.model.search(urlPath: self.urlPath, name: self.restaurant.login ?? "") | |
} else if self.restaurant.id == 2 { | |
self.model.search(urlPath: self.urlPath, name: self.restaurant.login ?? "") | |
} | |
} | |
} | |
} | |
final class OrientationModel: ObservableObject { | |
@Published private(set) var users = [Restaurant]() | |
@Published private(set) var userName = [String]() | |
private var cancellable: Cancellable? { | |
didSet { oldValue?.cancel() } | |
} | |
deinit { | |
cancellable?.cancel() | |
} | |
func search(urlPath: String, name: String) { | |
guard !name.isEmpty else { | |
return users = [] | |
} | |
var urlComponents = URLComponents(string: urlPath)! | |
urlComponents.queryItems = [ | |
URLQueryItem(name: "q", value: name) | |
] | |
var request = URLRequest(url: urlComponents.url!) | |
request.addValue("application/json", forHTTPHeaderField: "Content-Type") | |
print(request) | |
cancellable = URLSession.shared.dataTaskPublisher(for: request) | |
.map { $0.data } | |
.decode(type: SearchUserResponse.self, decoder: JSONDecoder()) | |
.map { $0.items } | |
.replaceError(with: []) | |
.receive(on: RunLoop.main) | |
.assign(to: \.users, on: self) | |
} | |
func fetchImage(for user: Restaurant) { | |
guard let url = user.avatar_url else { return } | |
let request = URLRequest(url: url) | |
_ = URLSession.shared.dataTaskPublisher(for: request) | |
.map { $0.data} | |
.replaceError(with: nil) | |
.receive(on: RunLoop.main) | |
} | |
} | |
struct SearchUserResponse: Decodable { | |
var items: [Restaurant] | |
} |
Author
DaisukeNagata
commented
Dec 21, 2019
add SceneDelegate
import UIKit
import SwiftUI
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
var window: UIWindow?
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
// Create the SwiftUI view that provides the window contents.
let contentView = ContentView()
let settings = OrientationModel()
// Use a UIHostingController as window root view controller.
if let windowScene = scene as? UIWindowScene {
let window = UIWindow(windowScene: windowScene)
window.rootViewController = UIHostingController(rootView: contentView.environmentObject(settings))
self.window = window
window.makeKeyAndVisible()
}
}
func sceneDidDisconnect(_ scene: UIScene) {
// Called as the scene is being released by the system.
// This occurs shortly after the scene enters the background, or when its session is discarded.
// Release any resources associated with this scene that can be re-created the next time the scene connects.
// The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
}
func sceneDidBecomeActive(_ scene: UIScene) {
// Called when the scene has moved from an inactive state to an active state.
// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}
func sceneWillResignActive(_ scene: UIScene) {
// Called when the scene will move from an active state to an inactive state.
// This may occur due to temporary interruptions (ex. an incoming phone call).
}
func sceneWillEnterForeground(_ scene: UIScene) {
// Called as the scene transitions from the background to the foreground.
// Use this method to undo the changes made on entering the background.
}
func sceneDidEnterBackground(_ scene: UIScene) {
// Called as the scene transitions from the foreground to the background.
// Use this method to save data, release shared resources, and store enough scene-specific state information
// to restore the scene back to its current state.
}
}
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