binding.swift

gistfile1.txt

func intTextBinding(
    intBinding: Binding<Int?>,
    numberFormatter: NumberFormatter = NumberFormatter()) -> Binding<String> {
    return Binding(
        get: { numberFormatter.string(for: intBinding.wrappedValue)! },
        set: { numberString in
            if let number = numberFormatter.number(from: numberString) {
                intBinding.wrappedValue = Int(truncating: number)
            } else {
                intBinding.wrappedValue = nil
            }
    })
}