/** * Copyright (c) 2015-present, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ #import "RCTPicker.h" #import "RCTUtils.h" @interface RCTPicker() @end @implementation RCTPicker - (instancetype)initWithFrame:(CGRect)frame { if ((self = [super initWithFrame:frame])) { _selectedIndex = NSNotFound; self.delegate = self; } return self; } RCT_NOT_IMPLEMENTED(- (instancetype)initWithCoder:(NSCoder *)aDecoder) - (void)setItems:(NSArray *)items { _items = [items copy]; [self setNeedsLayout]; } - (void)setSelectedIndex:(NSInteger)selectedIndex { if (_selectedIndex != selectedIndex) { BOOL animated = _selectedIndex != NSNotFound; // Don't animate the initial value _selectedIndex = selectedIndex; dispatch_async(dispatch_get_main_queue(), ^{ [self selectRow:selectedIndex inComponent:0 animated:animated]; }); } } #pragma mark - UIPickerViewDataSource protocol - (NSInteger)numberOfComponentsInPickerView:(__unused UIPickerView *)pickerView { return 1; } - (NSInteger)pickerView:(__unused UIPickerView *)pickerView numberOfRowsInComponent:(__unused NSInteger)component { return _items.count; } #pragma mark - UIPickerViewDelegate methods - (NSDictionary *)itemForRow:(NSInteger)row { return _items[row]; } - (id)valueForRow:(NSInteger)row { return [self itemForRow:row][@"value"]; } - (NSString *)pickerView:(__unused UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(__unused NSInteger)component { return [self itemForRow:row][@"label"]; } - (void)pickerView:(__unused UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(__unused NSInteger)component { _selectedIndex = row; if (_onChange) { _onChange(@{ @"newIndex": @(row), @"newValue": [self valueForRow:row] }); } } @end