Created
June 21, 2020 12:59
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A SwiftUI field with a UIPickerView as a keyboard
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| import SwiftUI | |
| struct ContentView: View { | |
| @State var selectedIndex: Int? = nil | |
| let options: [String] = ["Option1", "Option2"] | |
| var body: some View { | |
| PickerField("Select an option", data: self.options, selectionIndex: self.$selectedIndex) | |
| } | |
| } |
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| import SwiftUI | |
| struct PickerField: UIViewRepresentable { | |
| // MARK: - Public properties | |
| @Binding var selectionIndex: Int? | |
| // MARK: - Initializers | |
| init<S>(_ title: S, data: [String], selectionIndex: Binding<Int?>) where S: StringProtocol { | |
| self.placeholder = String(title) | |
| self.data = data | |
| self._selectionIndex = selectionIndex | |
| textField = PickerTextField(data: data, selectionIndex: selectionIndex) | |
| } | |
| // MARK: - Public methods | |
| func makeUIView(context: UIViewRepresentableContext<PickerField>) -> UITextField { | |
| textField.placeholder = placeholder | |
| return textField | |
| } | |
| func updateUIView(_ uiView: UITextField, context: UIViewRepresentableContext<PickerField>) { | |
| if let index = selectionIndex { | |
| uiView.text = data[index] | |
| } else { | |
| uiView.text = "" | |
| } | |
| } | |
| // MARK: - Private properties | |
| private var placeholder: String | |
| private var data: [String] | |
| private let textField: PickerTextField | |
| } |
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| import SwiftUI | |
| class PickerTextField: UITextField { | |
| // MARK: - Public properties | |
| var data: [String] | |
| @Binding var selectionIndex: Int? | |
| // MARK: - Initializers | |
| init(data: [String], selectionIndex: Binding<Int?>) { | |
| self.data = data | |
| self._selectionIndex = selectionIndex | |
| super.init(frame: .zero) | |
| self.inputView = pickerView | |
| self.tintColor = .clear | |
| } | |
| @available(*, unavailable) | |
| required init?(coder: NSCoder) { | |
| fatalError("init(coder:) has not been implemented") | |
| } | |
| // MARK: - Private properties | |
| private lazy var pickerView: UIPickerView = { | |
| let pickerView = UIPickerView() | |
| pickerView.delegate = self | |
| pickerView.dataSource = self | |
| return pickerView | |
| }() | |
| // MARK: - Private methods | |
| @objc | |
| private func donePressed() { | |
| self.selectionIndex = self.pickerView.selectedRow(inComponent: 0) | |
| self.endEditing(true) | |
| } | |
| } | |
| // MARK: - UIPickerViewDataSource & UIPickerViewDelegate extension | |
| extension PickerTextField: UIPickerViewDataSource, UIPickerViewDelegate { | |
| func numberOfComponents(in pickerView: UIPickerView) -> Int { | |
| return 1 | |
| } | |
| func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { | |
| return self.data.count | |
| } | |
| func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { | |
| return self.data[row] | |
| } | |
| func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { | |
| self.selectionIndex = row | |
| } | |
| } |
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override func caretRect(for position: UITextPosition) -> CGRect {
.null
}
This will truly make it unselectable! Relevant StackOverflow post: https://stackoverflow.com/questions/32846678/how-to-disable-the-selection-of-a-uitextfield/62754240#62754240