Read and save objetcs or something else using UserDefaults

read_save_userdefaults.swift

private var swtSelected = [String : Bool]()

func save() {
    let preferences = UserDefaults.standard
    let currentLevelKey = Constants.PREFERENCE_OPTIONS_CHECKED
    preferences.set(swtSelected, forKey: currentLevelKey)
    let didSave = preferences.synchronize()
    if !didSave {
        debugPrint("don't save")
    }
}
    
func read() {
    let preferences = UserDefaults.standard
    let currentLevelKey = Constants.PREFERENCE_OPTIONS_CHECKED
    if preferences.object(forKey: currentLevelKey) == nil {
        //  Doesn't exist
    } else {
        swtSelected = preferences.dictionary(forKey: currentLevelKey) as! [String : Bool]
    }
}