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