func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { RSFloatInputView.stringTransformer = { orginal in // Transform the place holder string configured in XIB with your own way. // e.g return NSLocalizedString(orginal, comment: orginal) return orginal.replacingOccurrences(of: "TXT_", with: "") } RSFloatInputView.instanceTransformer = { instance in // Support multi-styles in one place using the tag if instance.tag == 0 { instance.floatPlaceHolderColor = UIColor.brown instance.textColor = UIColor.darkText instance.tintColor = UIColor.brown } if instance.tag == 1 { instance.floatPlaceHolderColor = UIColor.blue instance.textColor = UIColor.darkText instance.tintColor = UIColor.blue } } return true }