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SwiftUI TextField which only accepts integers and binds to an Int? instead of a String
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import SwiftUI | |
private class IntegerTextFieldValue: ObservableObject { | |
@Published var value = "" { | |
didSet { | |
let numbersOnly = value.filter { $0.isNumber } | |
if value != numbersOnly { | |
value = numbersOnly | |
} | |
} | |
} | |
} | |
struct IntegerTextField: View { | |
@Binding var value: Int? | |
@StateObject private var fieldValue = IntegerTextFieldValue() | |
var placeholder = "" | |
var body: some View { | |
TextField(placeholder, text: $fieldValue.value) | |
.keyboardType(.numberPad) | |
.onChange(of: fieldValue.value) { value = Int($0) } | |
.onAppear { | |
if let value = value { | |
fieldValue.value = "\(value)" | |
} | |
} | |
} | |
} | |
struct NumericTextField_Previews: PreviewProvider { | |
static var previews: some View { | |
IntegerTextField(value: .constant(17)) | |
.textFieldStyle(RoundedBorderTextFieldStyle()) | |
.padding() | |
} | |
} |
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