我一直在测试 SwiftUI ,以了解我可以使用它多远。现在,我想确定是否可以将SwiftUI View
中的字符串直接传递给UIViewController
。我想用UILabel
显示此字符串。 UILabel
是我故事板上的全部内容。
以下是我的视图控制器(UIViewController
)。
import UIKit
import SwiftUI
class HomeViewController: UIViewController {
var message = String()
@IBOutlet weak var messageLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
messageLabel.text = message
}
}
struct HomeViewControllerRepresentation: UIViewControllerRepresentable {
func makeUIViewController(context: UIViewControllerRepresentableContext<HomeViewControllerRepresentation>) -> HomeViewController {
UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "homeViewController") as! HomeViewController
}
func updateUIViewController(_ uiViewController: HomeViewController, context: UIViewControllerRepresentableContext<HomeViewControllerRepresentation>) {
}
}
我的SwiftUI View
如下。
import SwiftUI
struct ContentView: View {
var body: some View {
NavigationView {
VStack {
NavigationLink(destination: HomeViewControllerRepresentation(message: "GGG")) { // Error
Text("Tap me")
}
}
.navigationBarTitle("")
.navigationBarHidden(true)
}
}
}
我希望我可以通过HomeViewControllerRepresentation传递一个字符串。但这是行不通的。是否有一种简单的方法将数据从SwiftUI View
传递到UIViewController
?谢谢。
答案 0 :(得分:1)
UIViewControllerRepresentable
不是代理,而是包装器,因此应像
struct HomeViewControllerRepresentation: UIViewControllerRepresentable {
var message: String
func makeUIViewController(context: UIViewControllerRepresentableContext<HomeViewControllerRepresentation>) -> HomeViewController {
let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "homeViewController") as! HomeViewController
controller.message = self.message
return controller
}
func updateUIViewController(_ uiViewController: HomeViewController, context: UIViewControllerRepresentableContext<HomeViewControllerRepresentation>) {
}
}