A Domain specific UserDefaults wrapper

gistfile1.txt

// This class helps facilitate using non-standard defaults.  
// Typically standardDefaults will save into "<bundle_identifier>.plist"
// You can use a different one.  The BundleUserDefaults class will save into "BundleUserDefaults.plist"
// This means you can clear it without effecting the standard one.

// Base class that all user defaults inherit from
class MyUserDefaults: NSObject {
    public let suiteName: String
    public let user_default: UserDefaults
    init(suiteName: String) {
        self.suiteName = suiteName
        user_default = UserDefaults(suiteName: suiteName)!
    }
    
    func removeSuite() {
        user_default.removeSuite(named: suiteName)
    }
    
}

// Bundle specific.
class BundleUserDefaults: MyUserDefaults {
    // includes a shared static property with the suiteName the same as the class name
    static let shared = BundleUserDefaults(suiteName: "BundleUserDefaults")
    
    // accessor methods. Use of #function assumes the string "m"
    var m: String {
        get { return user_default.string(forKey: #function) ?? "" }
        set { user_default.set(newValue, forKey: #function) }
    }
    
    var x: Int {
        get { return user_default.integer(forKey: #function) }
        set { user_default.set(newValue, forKey: #function) }
    }
}

/// Usage
BundleUserDefaults.shared.m = "dog"
BundleUserDefaults.shared.x = 9