SwiftUI包装UICollectionView并使用组合布局

import SwiftUI

struct ContentView: View {
    let data = ["Item 1", "Item 2", "Item 3", "Item 4", "Item 5"]
    
    var body: some View {
        UICollectionViewWrapper(data: data) { item in
            Text(item)
                .frame(width: 100, height: 100)
                .background(Color.blue)
                .cornerRadius(10)
        }
    }
}

struct UICollectionViewWrapper<Data, Content>: UIViewRepresentable where Data: RandomAccessCollection, Content: View {
    let data: Data
    let content: (Data.Element) -> Content
    
    func makeUIView(context: Context) -> UICollectionView {
        let layout = UICollectionViewFlowLayout()
        layout.itemSize = CGSize(width: 100, height: 100)
        layout.minimumInteritemSpacing = 10
        layout.minimumLineSpacing = 10
        
        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
        collectionView.dataSource = context.coordinator
        
        return collectionView
    }
    
    func updateUIView(_ uiView: UICollectionView, context: Context) {
        uiView.reloadData()
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator(data: data, content: content)
    }
    
    class Coordinator: NSObject, UICollectionViewDataSource {
        let data: Data
        let content: (Data.Element) -> Content
        
        init(data: Data, content: @escaping (Data.Element) -> Content) {
            self.data = data
            self.content = content
        }
        
        func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
            data.count
        }
        
        func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)
            
            let item = data[indexPath.item]
            let hostingController = UIHostingController(rootView: content(item))
            hostingController.view.frame = cell.contentView.bounds
            hostingController.view.backgroundColor = .clear
            
            for subview in cell.contentView.subviews {
                subview.removeFromSuperview()
            }
            
            cell.contentView.addSubview(hostingController.view)
            
            return cell
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}