![]() ![]() Code Complete: A Practical Handbook of Software Construction. This allows us to use custom initializers for SwiftUI views and to pass dependencies that views need. For more videos like this, visit This tutorial outlines the basics necessary for using Objective-C and the Cocoa Frameworks alongside Xcode and Interface Builder to create powerful Mac OS X applications. You can also notice that we are passing text String argument to create function.This is because NSObject is the root class of most Objective-C class hierarchies, from which subclasses inherit a basic interface to the runtime system and the ability to behave as Objective-C objects. To expose HelloWorldViewFactory to Objective-C code we need to prefix it with annotation and we need to subclass NSObject. ![]() HelloWorldViewFactory class has one static function create(text:) that will create the HelloWorldView and initialize it, wrap it inside the UIHostingController and return it.There are a couple of things happening in the HelloWorldViewFactory class implementation above, so let’s cover them one by one: In UIHostingController initializer we pass the SwiftUI view that we want to wrap like in the example class HelloWorldViewFactory : NSObject To create UIViewController instance from SwiftUI view we need to wrap it into a UIHostingController. UIKit can only present or push UIViewController instances. SwiftUI and UIKitīecause we will be displaying SwiftUI views from UIKit we first need to know what abstractions to use to wrap SwiftUI views. Xcode is a robust, easy-to-use, and well-designed IDE that’s great for writing code, debugging, and simulating apps built for Apple platforms. The only way to bridge the two worlds is to use some kind of a mediator class between Objective-C and Swift code. Objective-C Objective-C++ C C++ Java Applescript Python Ruby (Ruby on Rails) Objective-C++ can compile the source files using a combination of Objective-C and C++ syntax. SwiftUI views are structs and they are not visible from the Objective-C code. There are some limitations between Objective-C and Swift regarding SwiftUI. In this article I will explain how I did that. That means I had to display SwiftUI views from Objective-C ViewControllers. It was also a great way to escape UIKit for a little and learn more about SwiftUI. The app that I work on my daily job is based on Objective-C and I wanted to prototype some things in SwiftUI because it was faster and more fun. SwiftUI is getting more mature with every new major iOS release and it is now in a state where it can be used for a lot of use cases.
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