From the course: Practical Design Patterns in Swift
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Consolidating complex functionality - Swift Tutorial
From the course: Practical Design Patterns in Swift
Consolidating complex functionality
- [Instructor] In the following demo, we're going to build a Facade class that provides a simplified interface to work with the Natural Language framework. We start with the playground called NLPFacadeDemo. I'm going to add a new source file, so let's reveal the navigator. And I add a new file called NLPFacade. The first step is to import the Natural Language framework. Next, I create a public class called NLPFacade. NLPFacade. This class will expose a couple of public methods. The first method will return the dominant language of the input text. I make it a class method and call it dominantLanguage for string. The input string should be of type String and the return type is also a String. The method analyzes the input text and returns the language or nil if it can't recognize the language. That's why we have an optional String as a return type. To identify the language, we rely on the NLLanguageRecognizer class. I create a constant called language equals NLLanguageRecognizer, and…
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