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Two way binding library for Swift
.package(url: "https://github.com/scalefocus/TwoWayBondage.git", from: "2.2.0")


Swift Version License Build Status CocoaPods Compatible Platform

Easy to use two way binding Library. Simpliest way to bind values from ViewModels to Views. Based on SimpleTwoWayBinding

Table of contents


  • iOS 12.0+
  • Swift 5


TwoWayBondage is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'TwoWayBondage'

To get the full benefits import TwoWayBondage at the start of the source file:

import TwoWayBondage

Usage Example

Create ViewModel

All of the bindable properties should be declared as Observable in ViewModel.

import TwoWayBondage

struct ExampleViewModel {
    let name: Observable<String> = Observable<String>()
    let isBroccoliLover: Observable<Bool> = Observable<Bool>()
    let isIceCreamLover: Observable<Bool> = Observable<Bool>(true)

Create ViewController

To bind an Observable with UIControls and vise versa - bind or bindAndFire should be called in ViewController.

@IBOutlet private weak var nameTextField: UITextField!
@IBOutlet private weak var welcomeLabel: UILabel!
@IBOutlet private weak var iceCreamSwitch: UISwitch!

override viewDidLoad() {

private func bindEvents() {

    viewModel.name.bind { [weak self] name in
        self?.welcomeLabel.text = name
    vieModel.isIceCreamLover.bindAndFire { [weak self] value in
        self?.iceCreamSwitch.setOn(value, animated: true)


TwoWayBondage is available under the MIT license. See the LICENSE file for more info.


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