[英]Is it ok to call closures in UIKit UIViewController from Hosted SwiftUI View?
[英]How to Navigating from SwiftUI View to UIKit UIViewController
到目前为止,我有一个完全使用 UIKit 构建的应用程序。但是,我希望能够开始实现一些 SwiftUI 视图来替换一些 UIViewController。
我已经能够做到这一点,从 UIViewController 导航到 SwiftUI 点击按钮查看:
@IBAction func buttonTapped(_ sender: Any) {
let newView = UIHostingController(rootView: SwiftUIView(viewObj: self.view, sb: self.storyboard, dismiss: self.dismiss) )
view.window?.rootViewController = newView
view.window?.makeKeyAndVisible()
}
我的问题是,我如何从单个 SwiftUI 视图过渡到 UIViewController?(因为应用程序的 rest 在 UIKit 中)? 我在 SwiftUI 视图中有一个按钮,点击它可以导航回 UIViewController。 我试过了:
view
和storyboard
对象传递给 SwiftUI 视图,然后调用执行类似于上述代码的操作以更改当前视图 controller。但是,在模拟器上尝试时没有任何反应。.present
以模态方式显示 SwiftUI 视图。 这有效,我可以允许 SwiftUI View .dismiss
本身。 但是,这只能以模态方式工作,我希望能正常工作(即更改屏幕)这是我的简单 SwiftUI 视图:
struct SwiftUIView: View {
var viewObj:UIView? // Perhaps use this for transition back?
var sb:UIStoryboard?
var dismiss: (() -> Void)?
var body: some View {
Button(action: {
// Do something here to Transition
}) {
Text("This is a SwiftUI view.")
}
}
}
我无法理解如何正确地将 SwiftUI 集成到 UIKit 中,而不是相反,而且我不确定UIViewControllerRepresentable
是否是这个问题的答案。 非常感谢对此的任何解决方案、替代方案或有用的知识。 再次感谢!
再见,
我试图通过使用闭包回调来遵循您的方法。
struct SwiftUIView: View {
var dismiss: (() -> Void)?
var present: (()->Void)?
var body: some View {
VStack(spacing: 20) {
Button(action: {
self.dismiss?()
}) {
Text("Dismiss me")
}
Button(action: {
self.present?()
}) {
Text("Present some UIViewController")
}
}
}
}
当你展示你的 UIHostingController 时,你想要实现 2 个闭包回调:
@IBAction func buttonTapped(_ sender: Any) {
let hostingController = UIHostingController(rootView: SwiftUIView())
hostingController.rootView.dismiss = {
hostingController.dismiss(animated: true, completion: nil)
}
hostingController.rootView.present = {
let destination = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(identifier: "VC_TO_PRESENT")
hostingController.present(destination, animated: true, completion: nil)
}
present(hostingController, animated: true, completion: nil)
}
你可以做同样的事情,只能按照镜像顺序,比如跟随(scratchy)......
Button(action: {
if let vc = self.sb?.instantiateViewController(withIdentifier: "some_identifier") {
self.viewObj?.window?.rootViewController = vc
// or via present as alternate
// self.viewObj?.window?.rootViewController.present(vc, animated: true, completion: nil)
}
}) {
将您的 UIViewController 包装到 UIViewControllerRepresentable 包装器。
struct LessonDetailsViewControllerWrapper: UIViewControllerRepresentable { typealias UIViewControllerType = UIViewController func makeUIViewController(context: UIViewControllerRepresentableContext<LessonDetailsViewControllerWrapper>) -> UIViewController { let viewController = LessonDetailsViewController() return viewController } func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<LessonDetailsViewControllerWrapper>) {} }
然后从您的 SwiftUI 视图使用导航链接进行导航:
NavigationLink(destination: LessonDetailsViewControllerWrapper()) { LessonRow(lesson: lesson) }
您可以更改演示样式和过渡样式以全屏显示控制器
let vc = UIHostingController(rootView: LoginView())
vc.modalPresentationStyle = .fullScreen
vc.modalTransitionStyle = .crossDissolve
self.present(vc, animated: true)
这是来自 UIKit Button Press 的推送导航控制器的示例
let controller = UIHostingController(rootView: LoginViewController())
self.navigationController?.pushViewController(controller, animated: true)
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