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Protocol injection

Protocol injection: iOS App Development: Design Patterns for Mobile Architecture
Protocol injection: iOS App Development: Design Patterns for Mobile Architecture

In order to completely decouple your layers from concrete implementations, you need to make protocols that provide an abstract interface. This allows you to swap out different classes that conform to these protocols. This can be useful when you want to test a single class, and don't care about the dependencies. You can mock up a fake class the gives you data in the way you expect and then you can test how your class deals with the result. Faking the layers can be useful too when you are developing a new feature, but don't have the actual data pieces in place yet. With interfaces, you can make a fake class that returns the data you need to work with.

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Skill Level Intermediate
1h 52m
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32,918
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Skills covered in this course
Developer Mobile Apps Mac OS iOS

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