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9:08
Testing and Mocking (Combine)
Mastering MVVM With Swift
It is time to unit test the AddLocationViewModel class. Create a new unit test case class in the Test Cases group of the CloudyTests target and name it AddLocationViewModelTests.swift.
8:28
Testing and Mocking (RxSwift)
Mastering MVVM With Swift
It is time to unit test the AddLocationViewModel class. Create a new unit test case class in the Test Cases group of the CloudyTests target and name it AddLocationViewModelTests.swift.
7:15
Protocol Oriented Programming and Dependency Injection (Combine)
Mastering MVVM With Swift
If we want to unit test the AddLocationViewModel class, we need the ability to stub the responses of the geocoding requests we make to Apple's location services. Only then can we write fast and reliable unit tests. Being in control of your environment is essential if your goal is creating a fast and robust test suite.
7:22
Protocol Oriented Programming and Dependency Injection (RxSwift)
Mastering MVVM With Swift
If we want to unit test the AddLocationViewModel class, we need the ability to stub the responses of the geocoding requests we make to Apple's location services. Only then can we write fast and reliable unit tests. Being in control of your environment is essential if your goal is creating a fast and robust test suite.
4:40
Refactoring the View Controller Using Combine
Mastering MVVM With Swift
We put the foundation in place in the previous episode by refactoring the AddLocationViewModel class. We complete the integration with the Combine framework in this episode by refactoring the AddLocationViewController class.
10:51
Refactoring the View Model Using Combine
Mastering MVVM With Swift
Before we integrate the Combine framework into the project, I want to briefly revisit the RxSwift and RxCocoa integration. RxSwift is a reactive extension for the Swift language and, as the name suggests, RxCocoa reactifies the Cocoa components you use day in day out.
8:10
Initial Values and Projected Values
Working With Property Wrappers
In the previous episode, you learned about the anatomy of property wrappers. Property wrappers aim to reduce code duplication and improve the readability of the code you write. They also implicitly document the code when implemented and applied correctly. That is an added bonus. In this episode, we explore a few additional features of property wrappers.
in Swift
3:51
Why Combine
Mastering MVVM With Swift
RxSwift has been around for many years, but it isn't the only option you have. In 2019, Apple introduced Combine, a system framework that brings reactive programming to Apple's platforms. The framework provides a declarative API for processing values of time.
8:19
Anatomy of a Property Wrapper
Working With Property Wrappers
Property wrappers were introduced in Swift 5.1 to eliminate boilerplate code, facilitate code reuse, and enable more expressive APIs. You may have noticed that SwiftUI and Combine make heavy use of property wrappers. Property wrappers are completely optional. You can write Swift without property wrappers. But once you become familiar with their benefits and understand how they work, you will understand why the Swift community is so excited about this addition to the language.
in Swift
5:31
Refactoring the View Controller Using RxSwift
Mastering MVVM With Swift
The changes we made in the previous episode broke the application. To fix what we broke, we need to update the implementation of the AddLocationViewController class. Open AddLocationViewController.swift and add an import statement for RxSwift and RxCocoa at the top.
7:04
Refactoring the View Model Using RxSwift
Mastering MVVM With Swift
With RxSwift and RxCocoa integrated into the project, it is time to refactor the AddLocationViewModel class. Make sure you open the workspace CocoaPods created for us in the previous episode. Open AddLocationViewModel.swift and add an import statement for RxSwift and RxCocoa at the top.
2:02
Integrating RxSwift and RxCocoa
Mastering MVVM With Swift
There are several options to integrate RxSwift and RxCocoa into an Xcode project. The README of the RxSwift project shows you the different possibilities. I mostly use CocoaPods and that is the approach I take in this series. If you would like to follow along with me, make sure you have CocoaPods installed. You can find more information about installing CocoaPods on the CocoaPods website.