SwiftUI 创建controller的两种形式

1. 单独创建并移植UIHostingController

import UIKit
import SwiftUI

class Controller1: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置背景颜色
        self.view.backgroundColor = .white
        
        // 创建并添加 SwiftUI 视图
        let contentView = UIHostingController(rootView: ContentView())
        addChild(contentView)
        contentView.view.frame = self.view.bounds
        self.view.addSubview(contentView.view)
        contentView.didMove(toParent: self)
    }
}


struct ContentView: View {
    var body: some View {
        VStack {
            Text("This is ContentView")
                .font(.largeTitle)
                .padding()
            
            // 其他内容
        }
    }
}

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

2. 直接继承自UIHostingController

class CreationController: UIHostingController<CreationView> {
    
    typealias ContentView = CreationView
    
    private let viewModel: ContentView.ViewModel
    
    deinit {
        HXLogger.debug("Running ☠️ \(Self.self) 💀 deinit")
    }
    
    init(fromWorks: Bool, config: ContentView.Config) {
        viewModel = .init(fromWorks: fromWorks, config: config)
        super.init(rootView: ContentView(viewModel: viewModel))
    }
    
    @MainActor required dynamic init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override var preferredStatusBarStyle: UIStatusBarStyle {
        if #available(iOS 17.0, *) {
            .default
        } else {
            viewModel.isDark ? .lightContent : .darkContent
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        if #available(iOS 14.8, *) {
            initialize()
        }
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        if #unavailable(iOS 14.8) {
            initialize()
        }
    }
    
    private func initialize() {
        
        view.backgroundColor = viewModel.isDark ? .hex(0x03141A) : .white
        view.layer.masksToBounds = true
        
        navigationController?.setNavigationBarHidden(true, animated: false)
        
        viewModel.closeHandler = { [unowned self] isBackward in
            if let navigationController {
                if isBackward {
                    navigationController.popViewController(animated: true)
                } else {
                    navigationController.popToRootViewController(animated: true)
                }
            } else {
                dismiss(animated: true)
            }
        }
        
        viewModel.deleteSheetHandler = { [unowned self] in
            showDeleteSheet()
        }
        
        viewModel.reportHandler = { [unowned self] in
            ReportView.with(templateId: viewModel.config.workId).show()
        }
        
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        if !viewModel.isFromWorks {
            navigationController?.interactivePopGestureRecognizer?.isEnabled = false
        }
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        if !viewModel.isFromWorks {
            navigationController?.interactivePopGestureRecognizer?.isEnabled = true
        }
    }
    
    func showDeleteSheet() {
        HXPresentView()
            .configSubtitle("Are you sure to delete it?".localized)
            .configCertainText("Delete".localized)
            .configCancelText("Cancel".localized)
            .configCertain { [weak self] in
                guard let self else { return true }
                self.viewModel.handleDeleteRequest()
                Tracker.click(.creationDelete, params: [.workId(self.viewModel.config.workId)])
                return true
            }
            .show()
    }
    
}