BothamUI

BothamUI is MVP (Model-View-Presenter) framework written in Swift.

This project will help you setup all your presentation logic. BothamUI provides classes to represent the main components of this pattern like BothamViewController and BothamPresenter.

In addition we will use a wireframe navigation model and a service locator example[[5] [di]].

Screenshots

Application UI/UX designs by Luis Herrero.

Data provided by Marvel. © 2015 MARVEL

Usage

This framework contains all the classes needed to implement your presentation logic following the MVP pattern. To use the view package, make your ViewController extend from Botham ViewController and specify in the storyboard wich class and Storyboard ID is linked to:

import BothamUI

class SampleViewController: BothamViewController {
    /*...*/
}

Storyboard

BothamStoryboard provide a series of methods to help you instantiate view controllers by there storyboard ID. By default instantiateViewController() will search for view controller with the storyboard ID with the same name as the class.

import BothamUI

let mainStoryboard = BothamStoryboard(name: "Main")
let viewController: SampleViewController = mainStoryboard.instantiateViewController("SampleViewController")
let viewController: SampleViewController = mainStoryboard.instantiateViewController()

Presenter

To follow the MVP pattern, BothamUI also provides a BothamPresenter protocol that will be responsible for all your presentation logic. BothamUI will take care of linking your view (a BothamViewController) with your presenter and subscribing it to its lifecycle. In order to do that, create a class that implement BothamPresenter and link it to your view:

import BothamUI

class SamplePresenter: BothamPresenter {
    private weak var ui: SampleUI?

    init(ui: CharacterDetailUI) {
        self.ui = ui
    }
    
    func viewDidLoad() {
        /* ... */
    }
}

protocol SampleUI: BothamUI {
	/* ... */
}

class SampleViewController: BothamViewController, SampleUI {
    /*...*/
}

Dependency injection

BothamUI is built around the concept of dependency injection, all the dependencies are provided by constructor or properties, base on what UIKit allows us.

ViewController Instantiation

In the example a Service Locator is used in order to instantiate view controllers, but you can also use Swinject or others DI frameworks.

class ServiceLocator {

    static let sharedInstance = ServiceLocator()

    func provideSampleViewController() -> SampleViewController {
        let viewController: SampleViewController = provideMainStoryboard().viewController()
        viewController.presenter = SamplePresenter(ui: viewController)
        return viewController
    }
}

Lifecycle

Once both, view and presenter, are linked you can react to your view lifecycle directly from the presenter. You will be also able to call your view easily from the presenter:

class SamplePresenter: BothamPresenter {
    private weak var ui: SampleUI?

    init(ui: CharacterDetailUI) {
        self.ui = ui
    }
    
    func viewDidLoad() {
        self.ui?.showMessage("Welcome to Botham")
    }
}

To understand when the lifecycle methods are called take a look at the following table:

BothamPresenter	UIViewController
viewDidLoad	viewDidLoad
viewWillAppear	viewWillAppear
viewDidAppear	viewDidAppear
viewWillDisappear	viewWillDisappear
viewDidDisappear	viewDidDisappear

Caveats

• ViewControllers instantiated view UIStoryboard, can't reference Generic Type.
• Presenter and ViewController have a circular reference (like a ViewController and Datasource).

CocoaPods

CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:

$ gem install cocoapods

CocoaPods 0.39.0+ is required to build BothamUI.

To integrate BothamUI into your Xcode project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!

pod 'BothamUI', '~> 1.0'

Then, run the following command:

$ pod install

Do you want to contribute?

Feel free to report us or add any useful feature to the library, we will be glad to improve it with your help.

Keep in mind that your PRs must be validated by Travis-CI.

License

Copyright 2015 Karumi

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.