Swift UIViewControllerRepresentable需要类型';一些观点';和';绝不';相等
使用Xcode 11 GM Seed编写一些SwiftUI代码,我遇到了一个我不理解的Swift错误Swift UIViewControllerRepresentable需要类型';一些观点';和';绝不';相等,swift,swiftui,Swift,Swiftui,使用Xcode 11 GM Seed编写一些SwiftUI代码,我遇到了一个我不理解的Swift错误 struct MainViewController: View { var body: some View { VStack { Text("Hello World!") } } } extension MainViewController : UIViewControllerRepresentable { fun
struct MainViewController: View {
var body: some View {
VStack {
Text("Hello World!")
}
}
}
extension MainViewController : UIViewControllerRepresentable {
func makeUIViewController(context: UIViewControllerRepresentableContext<MainViewController>) -> UINavigationController {
return UINavigationController()
}
func updateUIViewController(_ uiViewController: UINavigationController, context: UIViewControllerRepresentableContext<MainViewController>) {
}
}
我缺少ViewController和View之间的分离。错误是视图控制器不能有返回视图的主体 这项工作:
struct MainView : View {
var body: some View {
VStack {
Text("Hello World!")
}
}
}
struct MainViewController : UIViewControllerRepresentable {
func makeUIViewController(context: UIViewControllerRepresentableContext<MainViewController>) -> UIHostingController<MainView> {
return UIHostingController(rootView: MainView())
}
func updateUIViewController(_ uiViewController: UIHostingController<MainView>, context: UIViewControllerRepresentableContext<MainViewController>) {
}
}
struct MainView:View{
var body:一些观点{
VStack{
文本(“你好,世界!”)
}
}
}
结构MainViewController:UIViewControllerRepresentable{
func makeUIViewController(上下文:UIViewControllerRepresentableContext)->UIHostingController{
返回UIHostingController(rootView:MainView())
}
func updateUIViewController(uViewController:UIHostingController,上下文:UIViewControllerRepresentableContext){
}
}
然后将其实例化:
let viewController = UIHostingController<MainViewController>(rootView:MainViewController())
let viewController=UIHostingController(rootView:MainViewController())
let viewController = UIHostingController<MainViewController>(rootView:MainViewController())