RxTodo

RxTodo is an iOS application developed using RxSwift and MVVM design pattern. This project is for whom having trouble with learning RxSwift and MVVM due to lack of references. (as I did 😁)

Features

• MVVM design pattern
• Using RxDataSources
• Observing model create/update/delete across the view controllers
• Navigating between view controllers
• Immutable models and view models

Philisophy

• View doesn't have control flow. View cannot modify the data. View only knows how to map the data.

  Bad

  viewModel.title
      .map { $0 + "!" } // Bad: View should not modify the data
      .bindTo(self.titleLabel)

  Good

  viewModel.title
      .bindTo(self.titleLabel)

• View doesn't know what ViewModel does. View can only communicate to ViewModel about what View did.

  Bad

  viewModel.login() // Bad: View should not know what ViewModel does (login)

  Good

  self.loginButton.rx_tap
      .bindTo(viewModel.loginButtonDidTap) // "Hey I clicked the login button"
  
  self.usernameInput.rx_controlEvent(.EditingDidEndOnExit)
      .bindTo(viewModel.usernameInputDidReturn) // "Hey I tapped the return on username input"

• Model is hidden by ViewModel. ViewModel only exposes the minimum data so that View can render.

  Bad

  struct ProductViewModel {
      let product: Driver<Product> // Bad: ViewModel should hide Model
  }

  Good

  struct ProductViewModel {
      let productName: Driver<String>
      let formattedPrice: Driver<String>
      let formattedOriginalPrice: Driver<String>
      let originalPriceHidden: Driver<Bool>
  }

Requirements

• iOS 8+
• Swift 2.2
• CocoaPods (I used 1.0.0)

Screenshots

Contribution

Discussion and pull requests are welcomed 💖 Correcting English grammar is welcomed, too.

License

RxTodo is under MIT license. See the LICENSE for more info.