20190331 setting Bundle 用法

[ytyubox]

NotificationCenter.default.addObserver(
                                  self,
                                  selector: #selector(appWillEnterForeground),
                                  name: UIApplication.willEnterForegroundNotification,
                                  object: nil)

<dict>
    <key>Type</key>
    <string>PSToggleSwitchSpecifier</string>
    <key>Title</key>
    <string>Night Mode</string>
    <key>Key</key>
    <string>isNightMode</string>
    <key>DefaultValue</key>
    <false/>
</dict>

struct Theme {
  var isNightMode:Bool {
    return UserDefaults.standard.bool(forKey: "isNightMode")
  }
  var backgroundColor:UIColor {
    return isNightMode ? .black : .white
  }
  var foregroundColor:UIColor{
    return isNightMode ? .white : .black
  }
}

[ytyubox]

開啟設定頁的方法 UIApplication.shared.open(URL(string: UIApplication.openSettingsURLString)!)