How do I disable spaces in textfield?

I need to disable space inputs in my username text fields on Swift UI, how would I go about that?

Current code:

@State private var username = ""

CustomInputField(imageName: "at.circle.fill", placeholderText: "Username", text: $username)

Support is greatly appreciated! :)

CodePudding user response：

What you need is to create an observable object and filter the spaces every time the string changes. It should be pretty straightforward:

import SwiftUI

struct ContentView: View {
    @ObservedObject private var usernameManager = UsernameManager()
    var body: some View {
        VStack(alignment: .trailing, spacing: 0) {
            Text("Username:")
            TextField(
                usernameManager.string,
                text: $usernameManager.string
            )
            .keyboardType(.asciiCapable)
            .multilineTextAlignment(.trailing)
            .onChange(
                of: usernameManager.string,
                perform: usernameManager.editingChanged
            )
        }.padding(.trailing, 25)
    }
}

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

class UsernameManager: ObservableObject {
    @Published var string: String = ""
    func editingChanged(_ string: String) {
        self.string = string.filter(\.isWhitespace.negated)
    }
}

extension Bool {
    var negated: Bool { !self }
}