Created
October 30, 2021 10:00
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PickerTextField for medium post
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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.inputAccessoryView = toolbar | |
| self.tintColor = .clear | |
| guard let selectionIndex = selectionIndex.wrappedValue else { | |
| return | |
| } | |
| self.pickerView.selectRow(selectionIndex, inComponent: 0, animated: true) | |
| } | |
| @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 | |
| }() | |
| private lazy var toolbar: UIToolbar = { | |
| let toolbar = UIToolbar() | |
| let flexibleSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil) | |
| let doneButton = UIBarButtonItem( | |
| title: "Done", | |
| style: .done, | |
| target: self, | |
| action: #selector(donePressed) | |
| ) | |
| toolbar.setItems([flexibleSpace, doneButton], animated: false) | |
| toolbar.sizeToFit() | |
| return toolbar | |
| }() | |
| // 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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