65 lines
1.9 KiB
Swift
65 lines
1.9 KiB
Swift
//
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// MultiPicker.swift
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// Twigs
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//
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// Created by William Brawner on 5/20/22.
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// Copyright © 2022 William Brawner. All rights reserved.
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// Adapted from https://stackoverflow.com/a/58664469
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import SwiftUI
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struct MultiPicker: UIViewRepresentable {
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var data: [[String]]
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@Binding var selections: [Int]
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func makeCoordinator() -> MultiPicker.Coordinator {
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Coordinator(self)
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}
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func makeUIView(context: UIViewRepresentableContext<MultiPicker>) -> UIPickerView {
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let picker = UIPickerView(frame: .zero)
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picker.dataSource = context.coordinator
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picker.delegate = context.coordinator
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return picker
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}
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func updateUIView(_ view: UIPickerView, context: UIViewRepresentableContext<MultiPicker>) {
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for i in 0...(self.selections.count - 1) {
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view.selectRow(self.selections[i], inComponent: i, animated: false)
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}
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}
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class Coordinator: NSObject, UIPickerViewDataSource, UIPickerViewDelegate {
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var parent: MultiPicker
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init(_ pickerView: MultiPicker) {
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self.parent = pickerView
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}
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func numberOfComponents(in pickerView: UIPickerView) -> Int {
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return self.parent.data.count
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}
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func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
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return self.parent.data[component].count
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}
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func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
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return self.parent.data[component][row]
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}
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func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
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self.parent.selections[component] = row
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}
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}
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}
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struct MultiPicker_Previews: PreviewProvider {
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@State static var selections: [Int] = [0, 0]
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static var previews: some View {
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MultiPicker(data: [["a", "b", "c"], ["one", "two", "three"]], selections: $selections)
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}
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}
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