A Comprehensive Guide to Using SwiftUI Inside UIKit and UIKit Inside SwiftUI

Bridging the Gap: Integrating SwiftUI with UIKit

Modern iOS development offers two major UI frameworks: UIKit, the mature, imperative framework that has powered iOS apps for years, and SwiftUI, Apple’s newer, declarative approach to building user interfaces. Often, projects need to harness the strengths of both. In this article, we explore how to embed SwiftUI views within a UIKit-based application and how to incorporate UIKit components inside SwiftUI views.

Using SwiftUI Inside UIKit

The Role of UIHostingController

When you want to use a SwiftUI view in a UIKit environment, the primary tool is the UIHostingController. This specialized view controller acts as a bridge, allowing you to embed any SwiftUI view into your existing UIKit hierarchy.

Step-by-Step Integration

Create Your SwiftUI View:
Define a SwiftUI view as you normally would.

import SwiftUI

struct MySwiftUIView: View {
    var body: some View {
        Text("Hello from SwiftUI!")
            .font(.title)
            .padding()
    }
}

Initialize a UIHostingController:
Instantiate a…