SOLVED: How to remove extra numbers? 🙄

@Steven_Kirke

Oct '23

Good afternoon.

I decided to use Mr. @ygeras method formatting a test field.

What I can’t understand is why the check for the number and number of digits in the input field does not work? At least I print it correctly? 🙄

import SwiftUI

struct TestPhoneF {
    @PhoneMumberFormattedTest var phoneNumberTest: String
}

class TextFielsPhoneViewModel: ObservableObject {
    @Published var phoneMask = TestPhoneF(phoneNumberTest: "")
}

struct TextFielsPhoneView: View {
    @StateObject var vm = TextFielsPhoneViewModel()

    var body: some View {
        VStack {
            TextField("", text: $vm.phoneMask.phoneNumberTest)
                .foregroundColor(.black)
                .border(Color.black)
            Text("Example: +7 (555) 555-99-00")
                .foregroundColor(.black)
            Text("Count: \(vm.phoneMask.phoneNumberTest.count)")
                .foregroundColor(.red)
        }
        .padding()
        .background(.white)
        .border(Color.black)
    }
}

#if DEBUG
struct TextFielsPhoneView_Previews: PreviewProvider {
    static var previews: some View {
        TextFielsPhoneView()
    }
}
#endif

import Foundation

@propertyWrapper
struct PhoneMumberFormattedTest {

    enum MaskPhone: String {
        case mobile = "+X (XXX) XXX-XX-XX"
        case landline = "+XX XXXXXXXXXX"
    }

    private var phoneNumberTest: String

    init(wrappedValue: String) {
        phoneNumberTest = wrappedValue
    }

    var wrappedValue: String {
        get { phoneNumberTest }

        set(value) {
            if value.count <= 18 {
                print("Fill number")
                print("value - \(value)")
                let removeNonNuneric = value.removeNonNum()
                print("removeNonNuneric - \(removeNonNuneric)")
                let convert = removeNonNuneric.formatMaskPhone(.mobile)
                print("convert - \(convert)")
                let crop = String(convert.prefix(18))
                print("crop - \(crop)")
                phoneNumberTest = crop
            }
            if phoneNumberTest.count >= 18 {
                phoneNumberTest.removeLast()

            }

        }
    }
}

extension String {

    func removeNonNum() -> String {
        let target = "[^0-9]"
        let result = self.replacingOccurrences( of: target,
                                                 with: "",
                                                 options: .regularExpression)
        return result
    }

    func formatMaskPhone(_ mask: MaskPhone) -> String {
        let currentMask = mask.rawValue
        var result = ""
        var index = self.startIndex
        for ch in currentMask where index < self.endIndex {
            if ch == "X" {
                result.append(self[index])
                index = self.index(after: index)

            } else {
                result.append(ch)
            }
        }
        return result
    }
}

2

@ygeras

Oct '23

Hi Steven! If you use XCode 15, it is some changes they probably implemented behind the scene or there is a bug. My previous code also stopped working correclty. I found only this way to hanle this situation. Sample code below works as before. No idea what has been changed in XCode 15. When I installed 14 version back it worked just fine...

import Observation

struct BirthDateViewXcode15: View {
    @State var vm = UserModel()

    var body: some View {
        VStack {
            TextField("DD/MM/YYYY", text: $vm.user.birthDate)
                .onChange(of: vm.user.birthDate) {
                    vm.user.formatBirthDateString()
                }
        }
        .padding()
    }

}

@Observable
class UserModel {
    var user = User(birthDate: "")
}

struct User {
    var birthDate: String

    mutating func formatBirthDateString() {
        /// Inserting a slash in the third position to differentiate between day and month
        if birthDate.count == 3 {
            let startIndex = birthDate.startIndex
            let thirdPosition = birthDate.index(startIndex, offsetBy: 2)
            let thirdPositionChar = birthDate[thirdPosition]
            if thirdPositionChar != "/" {
                birthDate.insert("/", at: thirdPosition)
            }
        }

        /// Inserting a slash in the sixth position to differentiate between month and year
        if birthDate.count == 6 {
            let startIndex = birthDate.startIndex
            let sixthPosition = birthDate.index(startIndex, offsetBy: 5)
            let sixthPositionChar = birthDate[sixthPosition]
            if sixthPositionChar != "/" {
                birthDate.insert("/", at: sixthPosition)
            }
        }

        /// Removing / when going back
        if birthDate.last == "/" {
            birthDate.removeLast()
        }

        /// Limiting string, including two slashes (8 + 2 = 10)
        birthDate = String(birthDate.prefix(10))
    }
}

2

@Steven_Kirke

Oct '23

Hello. I have a version "Version 15.0 beta (15A5160n)".

Yesterday, for example, your code worked, but today it doesn’t.

2

@Steven_Kirke

Oct '23

It worked for me!

import SwiftUI

class TextFielsPhoneViewModel: ObservableObject {
    @Published var phoneMask = PhoneMumberFormattedTest(phoneNumberTest: "")
}

struct TextFielsPhoneView: View {
    @StateObject var vm = TextFielsPhoneViewModel()

    @State var textField: String = ""

    var body: some View {
        VStack {
            TextField("", text: $vm.phoneMask.phoneNumberTest)
                .onChange(of: vm.phoneMask.phoneNumberTest) { value in
                    vm.phoneMask.formatBirthDateString()

                }
                .foregroundColor(.black)
                .border(Color.black)
        }
        .padding()
        .background(.white)
        .border(Color.black)
    }
}

#if DEBUG
struct TextFielsPhoneView_Previews: PreviewProvider {
    static var previews: some View {
        TextFielsPhoneView()
    }
}
#endif

struct PhoneMumberFormattedTest {

    var phoneNumberTest: String

    mutating func formatBirthDateString() {
        if phoneNumberTest.count <= 18 {
            print("Fill number")
            print("value - \(phoneNumberTest)")
            let removeNonNuneric = phoneNumberTest.removeNonNum()
            print("removeNonNuneric - \(removeNonNuneric)")
            let convert = removeNonNuneric.formatMaskPhone(.mobile)
            print("convert - \(convert)")
            let crop = String(convert.prefix(18))
            print("crop - \(crop)")
            phoneNumberTest = crop
        }
        if phoneNumberTest.count > 18 {
            phoneNumberTest.removeLast()

        }

    }
}

extension String {

    func removeNonNum() -> String {
        let target = "[^0-9]"
        let result = self.replacingOccurrences( of: target,
                                                 with: "",
                                                 options: .regularExpression)
        return result
    }

    func formatMaskPhone(_ mask: MaskPhone) -> String {
        let currentMask = mask.rawValue
        var result = ""
        var index = self.startIndex
        for ch in currentMask where index < self.endIndex {
            if ch == "X" {
                result.append(self[index])
                index = self.index(after: index)

            } else {
                result.append(ch)
            }
        }
        return result
    }
}

2

@ygeras

Oct '23

I don't know as soon as I ran my initial proposed code on XCode 15 in stopped working, so I just tried to solve it the other way. Seem like something has changed in APIs, but I have not idea what ))))

2

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