swift - 如何在我的 swift UI View 中添加 'skyfloatLabelText'？

Question

我想在 swift UI 中使用 skyfloatingLabelText。他们的示例如下所示

let textField = SkyFloatingLabelTextField(frame: CGRect(x: 10, y: 10, width: 200, height: 45))
textField.placeholder = "Name"
textField.title = "Your full name"
self.view.addSubview(textField)

我不知道如何在我的 swift UI 中实现上述代码。下面是我的快速用户界面。

import SwiftUI
import SkyFloatingLabelTextField


struct Login: View {

    var body: some View {

        VStack() {

            HeaderBar()
            Spacer()
            HStack {

                VStack {

                    Text("Login Page")
                        .fontWeight(.bold)

                    TextField("Name", text: Value) //default input is ok

                    Button(action: /*@START_MENU_TOKEN@*/{}/*@END_MENU_TOKEN@*/) {
                        Text("Login")

                    }

                }


            }
            Spacer()

        }


    }
}

struct Login_Previews: PreviewProvider {
    static var previews: some View {
        Login()
    }
}

提前致谢。

Answer 1

就像@Asperi 提到的那样，您需要为此使用 UIViewRepresentable。

委托(delegate)示例取自 github example .

import SwiftUI
import SkyFloatingLabelTextField

struct SkyFloatingContentView: UIViewRepresentable {
    class Coordinator: NSObject, UITextFieldDelegate {
        var parent: SkyFloatingContentView

        init(_ parent: SkyFloatingContentView) {
            self.parent = parent
        }

        func textFieldDidChangeSelection(_ textField: UITextField) {
            if let text = textField.text {
                if let floatingLabelTextField = textField as? SkyFloatingLabelTextField {
                    if (text.count < 3 || !text.contains("@")) {
                        floatingLabelTextField.errorMessage = "Invalid email"
                    } else {
                        // The error message will only disappear when we reset it to nil or empty string
                        floatingLabelTextField.errorMessage = ""
                    }
                }
            }
        }
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

    func makeUIView(context: Context) -> SkyFloatingLabelTextField {
        return SkyFloatingLabelTextField(frame: CGRect(x: 10, y: 10, width: 200, height: 45))
    }

    func updateUIView(_ textField: SkyFloatingLabelTextField, context: Context) {
        textField.placeholder = "Name"
        textField.title = "Your full name"
        textField.delegate = context.coordinator
    }
}

struct ContentView: View {
    var body: some View {
        VStack() {
            Spacer()

            HStack {
                VStack {
                    Text("Login Page")
                        .fontWeight(.bold)

                    SkyFloatingContentView()

                    Button(action: /*@START_MENU_TOKEN@*/{}/*@END_MENU_TOKEN@*/) {
                        Text("Login")
                    }
                }
            }

            Spacer()
        }
    }
}

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