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SOLVED: TextField - Dismiss keyboard - Clear button

Forums > SwiftUI

hi everybody!

does anyone know an easy and elegant way of dismissing the keyboard when finished with entry (especially when using numberPad or decimalPad) from a textField in SwiftUI? Also to add an clearButton and once the entry is cleared, that the placeholder will be shown?

Thanks a lot in advance for helping me out! Rgds, Martin

   

Hi Martin Hope this helps. Not sure the best way but found it works for me

struct ContentView: View {
    @State private var someNumber = ""
    @State private var enteredNumber = ""

    var body: some View {
        VStack {
            Text("\(enteredNumber)")

            TextField("PlaceHolder", text: $someNumber)
                .keyboardType(.decimalPad)
            Button("Submit") {
                self.enteredNumber = self.someNumber
                self.someNumber = "" // Clear text
                UIApplication.shared.endEditing() // Call to dismiss keyboard
            }
        }
        .padding()
    }
}

// extension for keyboard to dismiss
extension UIApplication {
    func endEditing() {
        sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
    }
}

if you want the view to move up and down to make room for keyboard you will need to add a func with

NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: .main) { key in
            let value = key.userInfo![UIResponder.keyboardFrameEndUserInfoKey] as! CGRect
            self.value = value.height
        }

        NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillHideNotification, object: nil, queue: .main) { key in
            self.value = 0
        }

and add .onAppear(perform: ----) to the view

1      

Thanks a lot Nigel!

I had to chance my idea of creating my UI, but your way makes it really easy to use now. thanks a lot!

Rgds, Martin

   

struct CustomTextfield: UIViewRepresentable {
    @Binding var text: String
    var keyType: UIKeyboardType
    var placeHolder: String
    func makeUIView(context: Context) -> UITextField {
        let textfield = UITextField()
      textfield.keyboardType = keyType
        textfield.placeholder = placeHolder
        let toolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: textfield.frame.size.width, height: 44))
        let doneButton = UIBarButtonItem(title: "Done", style: .done, target: self, action: #selector(textfield.doneButtonTapped(button:)))
        toolBar.items = [doneButton]
        toolBar.setItems([doneButton], animated: true)
        textfield.inputAccessoryView = toolBar
        return textfield
    }

    func updateUIView(_ uiView: UITextField, context: Context) {
        uiView.text = text
    }

    CustomTextfield(text: self.$updateAltEvent.rawScoreMin, keyType: UIKeyboardType.numberPad, placeHolder: "Minutes")
        .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: 50)
        .overlay(
            RoundedRectangle(cornerRadius: 6)
                .stroke(Color(red: 0.7, green: 0.7, blue: 0.7), lineWidth: 1)
    )
    CustomTextfield(text: self.$updateAltEvent.rawScoreSec, keyType: UIKeyboardType.numberPad, placeHolder: "Seconds")
        .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: 50)
        .overlay(
                RoundedRectangle(cornerRadius: 6)
                    .stroke(Color(red: 0.7, green: 0.7, blue: 0.7), lineWidth: 1)
        )
}

extension  UITextField{
    @objc func doneButtonTapped(button:UIBarButtonItem) -> Void {
       self.resignFirstResponder()
    }

}

> Implement here

CustomTextfield(text: self.$updateAltEvent.rawScoreSec, keyType: UIKeyboardType.numberPad, placeHolder: "Seconds")
                        .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: 50)
                        .overlay(
                                RoundedRectangle(cornerRadius: 6)
                                    .stroke(Color(red: 0.7, green: 0.7, blue: 0.7), lineWidth: 1)
                        )

1      

On a same idea I make custum deciamal textfield :

//
//  Extention UITextField+UIApplication End Editing Button.swift
//  Time Is Money
//
//  Created by Sebastien REMY on 15/07/2020.
//  Copyright © 2020 MonkeyDev. All rights reserved.
//

import SwiftUI

// Usage
//var currencyFormatter: NumberFormatter {
//    let formatter = NumberFormatter()
//    formatter.locale = .current
//    formatter.numberStyle = .currency
//    return formatter
//}
//  DecimalTextField("Enter amount",
//                   value: defaultRate,
//                   formatter: self.currencyFormatter)

struct DecimalTextField: UIViewRepresentable {
    private var placeholder: String
    @Binding var value: Double
    private var formatter: NumberFormatter

    init(_ placeholder: String,
         value: Binding<Double>,
         formatter: NumberFormatter ) {
        self.placeholder = placeholder
        self._value = value
        self.formatter = formatter
    }

    func makeUIView(context: Context) -> UITextField {
        let textfield = UITextField()
        textfield.keyboardType = .decimalPad
        textfield.delegate = context.coordinator
        textfield.placeholder = placeholder
        textfield.text = formatter.string(for: value) ?? placeholder
        textfield.textAlignment = .right

        let toolBar = UIToolbar(frame: CGRect(x: 0,
                                              y: 0,
                                              width: textfield.frame.size.width,
                                              height: 44))
        let doneButton = UIBarButtonItem(title: "Ok",
                                         style: .done,
                                         target: self,
                                         action: #selector(textfield.doneButtonTapped(button:)))
        let space = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace,
                                    target: nil,action: nil)
        toolBar.setItems([space, doneButton], animated: true)
        textfield.inputAccessoryView = toolBar
        return textfield
    }

    func updateUIView(_ uiView: UITextField, context: Context) {
        // Do nothing, needed for protocol
    }

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

    class Coordinator: NSObject, UITextFieldDelegate {
        var parent: DecimalTextField

        init(_ textField: DecimalTextField) {
            self.parent = textField
        }

        func textField(_ textField: UITextField,
                       shouldChangeCharactersIn range: NSRange,
                       replacementString string: String) -> Bool {

            // Allow only numbers and decimal characters
            let isNumber = CharacterSet.decimalDigits.isSuperset(of: CharacterSet(charactersIn: string))
            let withDecimal = (
                string == NumberFormatter().decimalSeparator &&
                    textField.text?.contains(string) == false
            )

            if isNumber || withDecimal,
                let currentValue = textField.text as NSString?
            {
                // Update Value
                let proposedValue = currentValue.replacingCharacters(in: range, with: string) as String

                let decimalFormatter = NumberFormatter()
                decimalFormatter.locale = Locale.current
                decimalFormatter.numberStyle = .decimal

                // Try currency formatter then Decimal formatrer
                let number = self.parent.formatter.number(from: proposedValue) ?? decimalFormatter.number(from: proposedValue) ?? 0.0

                // Set Value
                let double = number.doubleValue
                self.parent.value = double
            }

            return isNumber || withDecimal
        }

        func textFieldDidEndEditing(_ textField: UITextField,
                                    reason: UITextField.DidEndEditingReason) {
            // Format value with formatter at End Editing
            textField.text = self.parent.formatter.string(for: self.parent.value)
        }

    }
}

// MARK: extension for done button
extension  UITextField{
    @objc func doneButtonTapped(button:UIBarButtonItem) -> Void {
        self.resignFirstResponder()
    }

}

// MARK: extension for keyboard to dismiss
extension UIApplication {
    func endEditing() {
        sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
    }
}

   

Send action to resign on tap gesture. This will dissmiss keyboard on tap of screen.

struct OTPView: View {
    @State var otp: String = ""

    var body: some View {
        VStack {
            SecureField("****", text: $otp)
                .font(.system(size: 20, weight: .bold, design: .default))
        }
        .onTapGesture {
            UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to:nil, from:nil, for:nil)
        }
    }
}

   

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