Swift(UI)でのiPhoneアプリ開発時のTips

# デバイス全体サイズ
UIScreen.main.bounds.size

# 上部のセーフエリアのサイズ
UIApplication.shared.windows[0].safeAreaInsets

Text("ほげほげ")
  .font(.custom("Avenir-Roman", size: 20))

struct ExamplelView: View {
  @Environment(\.presentationMode) var presentation

  var body: some View {
    ...
    self.presentation.wrappedValue.dismiss()
    ...
  }
} 

@main
struct ExampleApp: App {
  @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
  var body: some Scene {
    WindowGroup {
      Text("Hello World")
    }
}

class AppDelegate: UIResponder, UIApplicationDelegate {
  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
    
    // ここに初期化等処理を書く

    return true
  }
}

@main
struct ExampleApp: App {
  @Environment(\.scenePhase) private var scenePhase
  var body: some Scene {
    WindowGroup {
      SomeMainView()
        .onOpenURL(perform: { url in
          // URLスキームからの起動の場合、ここが呼び出される
        })
    }.onChange(of: scenePhase) { phase in
      if phase == .active {
        FireStorageManager.sentUserStats()
      }
   }
}

SomeView()
  .overlay(
    RoundedRectangle(cornerRadius: 5)
    .stroke(Color.gray, lineWidth: 2)
  )

NavigationView {
  VStack {
  }.navigationBarTitle("hoge")
  .navigationBarHidden(true)
}

List {
  ...
}.listStyle(PlainListStyle())

URLCache.shared.removeAllCachedResponses()

struct ExampleObject: Codable {
  let persons: [Person]
}

struct Person: Codable {
  let name: String
  let age: Int
  let addressString: String
  
  // JSONのタグ名と異なキーとしたい場合は CodingKeys でマッピングさせる
  enum CodingKeys: String, CodingKey {
    case name
    case age
    case addressString = "address_string"
  }
}

guard let data = response.data else {
  return
}
guard let responseEntity = try? JSONDecoder().decode(ExampleObject.self, from: data) else {
  return
}

struct ExampleObject: Codable {
  let persons: [Person]    // "persons" Key は実際にはJSONには存在しない
}

extension ExampleObject {
    init(from decoder: Decoder) throws {
        var persons: [Person] = []
        var unkeyedContainer = try decoder.unkeyedContainer()
        while !unkeyedContainer.isAtEnd {
            let person = try unkeyedContainer.decode(Person.self)
            persons.append(person)
        }
        self.init(persons: persons)
    }
}

extension ExampleObject {
    func encode(to encoder: Encoder) throws {
        var container = encoder.unkeyedContainer()
        for person in persons {
            try container.encode(person)
        }
    }
}

import SwiftUI
import GoogleMaps

struct MapView: UIViewRepresentable {
    typealias UIViewType = GMSMapView
    let mapView = GMSMapView(frame: .zero)
    
    func makeCoordinator() -> Coordinator {
        Coordinator(mapView: mapView)
    }
 
    func makeUIView(context: Context) -> GMSMapView {
        // 初期化処理などはココに書く        
        return mapView
    }
    
    func updateUIView(_ uiView: GMSMapView, context: Context) {
        // 描画等の処理はココに書く
        // 呼び出されるタイミングは SwiftUI のStateオブジェクト変化時など        
    }
    
    final class Coordinator: NSObject, GMSMapViewDelegate {
        init(mapView: GMSMapView) {
            super.init()
            mapView.delegate = self
        }
        
        // Delegate の処理はココに追加する
        func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {
            return false
        }
        func mapView(_ mapView: GMSMapView, idleAt position: GMSCameraPosition) {
        }
    }    
}

"NSLocationWhenInUseUsageDescription" = "現在地の利用を許可頂くと地図モードで現在地が素早く確認できたり、ルートの検索ができるようになります";
"NSUserTrackingUsageDescription" = "「許可」するとお客様に最適化された広告が表示されます";

target 'SampleApp' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!

  # Pods for SampleApp
  ...

  post_install do |installer|
    installer.pods_project.build_configurations.each do |config|
      config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64"
    end
  end
end