David House

Protocol Oriented Dependency Injection

David House | Nov 10, 2017

Tight coupling between view controllers in your application can lead to difficult maintenance as you add and remove features. This video will explore how using Protocols can make our Dependency Injection more loosely coupled. This improves the flexibility of the code and makes our application easier to change.

After this video, you will be able to improve the maintainability of your code as we go from tightly coupled to loosely coupled interfaces.

Basic knowledge or experience building iOS applications is recommended.

For the More Curious...

Apple Developer - UIStackView
BNR Guide to iOS
BNR Guide to Swift
iOS & Swift Courses

Subscribers Only

Transcripts are for subscribers. Create an account today to access our collection of screencasts, skill packs, and more.

Subscribers Only

Project files are only available for subscribers. Create an account today to access our collection of screencasts, skill packs, and more.

Need Help?

If you get stuck, try starting a discussion with Big Nerd Ranch experts in the community tab.

Related Screencasts

Explore other screencasts related to this topic.

Interstitial Content Markers

7 minutes

Video content frequently contains interstitial content such as advertisements or interludes. In this video we will explore the AVKit provided classes for marking interstitial points in your videos.

Looping Multiple Videos on AppleTV

11 minutes

The Apple TV can be setup as a Kiosk that plays a series of videos on a loop at a business or school location. In this video, we will use AVFoundation to allow the videos to play one after the other in an infinite loop.

Finding and Fixing Memory Issues

7 minutes

Incorrectly managing memory in our applications can result in hard to find bugs and possible crashes. In this video, we will explore the Memory Graph debugging tool in Xcode and how you can use it to find and fix strong reference cycles in closures.

Creating a State Machine using Swift Enumerations

11 minutes

As View Controllers become more complex, the need to manage the state of the view becomes more important. In this video we will discuss how to use a state machine to manage our views state.

Using Container Views to Manage Complex Layouts

7 minutes

When you have a complex view controller view, sometimes it is helpful to break up the view into manageable chunks. In this video we will show how you can use container views to simplify the construction of certain layouts. After this video you will know when and how to use these container views in your applications.

Display Step Count Using HealthKit

11 minutes

HealthKit provides iPhone users with a rich set of activity and health data that is available for applications to use. In this video, we will cover the basics of getting access to HealthKit and visualizing a users daily step count. After this video you will be able to query HealthKit data to provide your users with unique and interesting ways to see their activity and general health.