How to Add Max length for a character for Swift UI - swift

Question

Hi i am creating a to do application and i am facing a problem when a user entering some characters to a UIText field i remember there was a way in SWIFT 5 to put a max length but i can't find one in SWIFT UI can someone send me a link or guide me step by step HOW CAN I ADD A MAX LENTGH TO A SWIFT UI PROJECT TO THE TEXT FIELD! THANKS
I tried to find it Everywhere but i can't
struct NewTaskView: View {
var taskStore: TaskStore
#Environment(\.presentationMode) var presentationMode
#State var text = ""
#State var priority: Task.Priority = .Низкий
var body: some View {
Form {
TextField("Название задания", text: $text)
VStack {
Text("Приоритет")
.multilineTextAlignment(.center)
Picker("Priority", selection: $priority.caseIndex) {
ForEach(Task.Priority.allCases.indices) { priorityIndex in
Text(
Task.Priority.allCases[priorityIndex].rawValue
.capitalized
)
.tag(priorityIndex)
}
}
.pickerStyle( SegmentedPickerStyle() )
}
I want to put max length to a text field where is written TextField("Название задания", text: $text)

Answer 1

It seems like this can be achieved with Combine, by creating a wrapper around the text and opening a 2 way subscription, with the text subscribing to the TextField and the TextField subscribing to the ObservableObject. I'd say the way it works its quite logical from a Reactive point of view but would have liked to find a cleaner solution that didn't require another object to be created.
import SwiftUI
import Combine
class TextBindingManager: ObservableObject {
#Published var text = "" {
didSet {
if text.count > characterLimit && oldValue.count <= characterLimit {
text = oldValue
}
}
}
let characterLimit = 5
}
struct ContentView: View {
#ObservedObject var textBindingManager = TextBindingManager()
var body: some View {
TextField("Placeholder", text: $textBindingManager.text)
}
}

Answer 2

I read this article. please check here
This is my whole code. I don't use EnvironmentObject.
struct ContentView: View {
#ObservedObject private var restrictInput = RestrictInput(5)
var body: some View {
Form {
TextField("input text", text: $restrictInput.text)
}
}
class RestrictInput: ObservableObject {
#Published var text = ""
private var canc: AnyCancellable!
init (_ maxLength: Int) {
canc = $text
.debounce(for: 0.5, scheduler: DispatchQueue.main)
.map { String($0.prefix(maxLength)) }
.assign(to: \.text, on: self)
}
deinit {
canc.cancel()
}
}