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[英]How to get SwiftUI TextField to show numbers but also accept an empty value
[英]TextField Value Going to be empty, SwiftUI
我正在使用 ObservableObject 來存儲 textField 的值這是我在 ObservableObject 中的代碼
class SignupViewModel: ObservableObject {
@Published var fullname = ""
@Published var birthday = ""
@Published var email = ""
@Published var password = ""
@Published var birthDate = Date()
@Published var isValidEmail = true
@Published var isEmailAlreadyExist = false
@Published var isPassword1 = true
@Published var isPassword2 = true
@Published var isDisable: Bool = false
}
我已經創建了這樣的實例並使用了它們
var body: some View {
ScrollView {
VStack(alignment: .leading, spacing: 5) {
TextFieldWithoutValidation(text: $signupModel.fullname, placeHolder: "Full name", keyBoardType: .default)
.accentColor(Color.black)
// LabelTextField(title: "Full name", text: $signupModel.fullname, keyboardType: .default, contentType: nil)
// TextField("Full name", text: $data.value)
Text("We’ll use this to issue you a cheque when you make a profit.")
.font(.system(size: 11.0))
}
DateView(titleText: "Birthday", date: $signupModel.birthDate, labelText: $signupModel.birthday)
TextFieldWithoutValidation(text: $signupModel.email, placeHolder: "Email", keyBoardType: .emailAddress)
.accentColor(Color.black)
if !signupModel.isValidEmail {
errorView(.emailNotValid)
}
SecureTextFieldWithoutValidation(text: $signupModel.password, placeHolder: "Password")
.accentColor(Color.black)
if !signupModel.password.isEmpty {
VStack(spacing: 0) {
errorView((signupModel.isPassword1 ? .passwordRight1 : .passwordWrong1))
errorView((signupModel.isPassword2 ? .passwordRight2 : .passwordWrong2))
}
}
createButton()
}
.padding(.leading, 20) // you can use as per your requirement(-16)
.padding(.trailing, 20)
.titleForNavigation("Create your account", displayMode: .large)
.navigationLayout(AnyView(backButton))
}
但是當我在 textField 和 go 中輸入內容到下一個 textField 之前的 textField 文本將自動為空
有人可以幫助解釋為什么會這樣嗎
我不確定這個答案是否有幫助,我能夠在操場上復制您的示例。
object 似乎在渲染之間和按下“保存”按鈕后保留其 state。
import PlaygroundSupport
class SignupViewModel: ObservableObject {
@Published var fullname = ""
@Published var birthday = ""
@Published var email = ""
@Published var password = ""
@Published var birthDate = Date()
@Published var isValidEmail = true
@Published var isEmailAlreadyExist = false
@Published var isPassword1 = true
@Published var isPassword2 = true
@Published var isDisable: Bool = false
}
struct ContentView: View {
@ObservedObject var signupModel = SignupViewModel()
var body: some View {
VStack{
Text("Sign up form")
TextField("Name", text: $signupModel.fullname)
TextField("Email", text: $signupModel.email)
TextField("Password", text: $signupModel.password)
Button(action: { print("Form data:"); print("\(signupModel.fullname) \(signupModel.email) \(signupModel.password)") }) {
Text("Save")
}
}
}
}
let viewController = UIHostingController(rootView: ContentView())
PlaygroundPage.current.liveView = viewController
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