How can I pass in a SwiftUI View in a function?-CodePudding

The app I'm working on is predominantly in UIKit. We are starting to shift to SwiftUI for smaller components and I wanted to write a neat little extension which would take in a SwiftUI view and return the UIKit view. This is the code I currently have:

    static func getUIView(for swiftUIView: View) -> UIView {
        let hostingController = UIHostingController(rootView: swiftUIView)
        return hostingController.view
    }
}

However this throws an error

Protocol 'View' can only be used as a generic constraint because it has Self or associated type requirements

Could someone explain to me why this is a problem and what would be the right way of achieving this?

CodePudding user response：

You simply need to make your method generic and restrict your generic type to View.

static func getUIView<V: View>(for swiftUIView: V) -> UIView {
    let hostingController = UIHostingController(rootView: swiftUIView)
    return hostingController.view
}

However, I'd rather suggest creating a computed property on View that returns a UIView from the view itself.

extension View {
    var uiView: UIView {
        UIHostingController(rootView: self).view
    }
}

And then call it on the View you want to convert to UIView:

Text("Label").uiView