DefaultsKey
DefaultsKey 允许您指定 UserDefaults 的类型和 defaultValue。
用法
import DefaultsKey
extension DefaultsKey {
static var firstLaunchedVersion: DefaultsKey<String?> {
return DefaultsKey<String?>(key: "first_launched_version", defaultValue: nil)
}
static var shouldShowAppRatingDialog: DefaultsKey<Bool> {
return DefaultsKey<Bool>(key: "should_show_app_rating_dialog", defaultValue: true)
}
static var appVersionHistory: DefaultsKey<[AppVersion]> {
return DefaultsKey<[AppVersion]>(key: "version_history", defaultValue: [])
}
}
struct AppVersion: Codable {
var versionString: String
}
// Set value using DefaultsKey
UserDefaults.standard.set(value: "1.0.0", forKey: .firstLaunchedVersion)
UserDefaults.standard.set(value: [AppVersion(versionString: "1.0.0")], forKey: .appVersionHistory) // You can use Codable value
// Get value using DefaultsKey
let firstLaunchedAt = UserDefaults.standard.value(forKey: .firstLaunchedVersion)
print(firstLaunchedAt) // 1.0.0
let shouldShowAppRatingDialog = UserDefaults.standard.value(forKey: .shouldShowAppRatingDialog)
print(shouldShowAppRatingDialog) // true
let appVersionHistory = UserDefaults.standard.value(forKey: .appVersionHistory)
print(appVersionHistory) // [AppVersion(versionString: "1.0.0")]