Swift 界 Then 的作者又一力作，RxTodo 教你如何进阶 RxSwift 和 MVVM

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.loginButton)
      // "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

  class ProductViewModel {
      let product: Driver // Bad: ViewModel should hide Model
  }

  Good

  class ProductViewModel {
      let productName: Driver
      let formattedPrice: Driver
      let formattedOriginalPrice: Driver
      let originalPriceHidden: Driver
  }

Requirements

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

Screenshots

Contribution

Discussion and pull requests are welcomed 💖

License

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