SwiftUIでAppStorageを使ってUserDefaultの値を監視する
SwiftUIでAppStorageを使ってUserDefaultの値を監視する方法です。 UserDefaultが変更されると画面が再描画されます。
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| import SwiftUI | |
| struct ContentView: View { | |
| @AppStorage("FAVORITE_POKEMON_NAME") var favoritePokemonName: String = "" | |
| var body: some View { | |
| VStack(spacing: 16) { | |
| Text("Your favorite pokemon is, \(favoritePokemonName)") | |
| Button("Snorlax is my mavorite pokemon.") { | |
| favoritePokemonName = "Snorlax" | |
| } | |
| Button("Snorlax is my mavorite pokemon.") { | |
| UserDefaults.standard.set("Slowpoke", forKey: "FAVORITE_POKEMON_NAME") | |
| } | |
| } | |
| } | |
| } |