react-native/React/Fabric/Mounting/ComponentViews/Switch/RCTSwitchComponentView.mm

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/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "RCTSwitchComponentView.h"
#import <fabric/components/switch/SwitchEventEmitter.h>
#import <fabric/components/switch/SwitchProps.h>
using namespace facebook::react;
@implementation RCTSwitchComponentView {
UISwitch *_switchView;
BOOL _wasOn;
}
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
_switchView = [[UISwitch alloc] initWithFrame:self.bounds];
[_switchView addTarget:self
action:@selector(onChange:)
forControlEvents:UIControlEventValueChanged];
const auto &defaultProps = SwitchProps();
_switchView.on = defaultProps.value;
self.contentView = _switchView;
}
return self;
}
- (void)updateProps:(SharedProps)props oldProps:(SharedProps)oldProps
{
if (!oldProps) {
oldProps = _props ?: std::make_shared<SwitchProps>();
}
_props = props;
[super updateProps:props oldProps:oldProps];
auto oldSwitchProps = *std::dynamic_pointer_cast<const SwitchProps>(oldProps);
auto newSwitchProps = *std::dynamic_pointer_cast<const SwitchProps>(props);
// `value`
if (oldSwitchProps.value != newSwitchProps.value) {
_switchView.on = newSwitchProps.value;
_wasOn = newSwitchProps.value;
}
// `disabled`
if (oldSwitchProps.disabled != newSwitchProps.disabled) {
_switchView.enabled = !newSwitchProps.disabled;
}
// `tintColor`
if (oldSwitchProps.tintColor != newSwitchProps.tintColor) {
_switchView.tintColor = [UIColor colorWithCGColor:newSwitchProps.tintColor.get()];
}
// `onTintColor
if (oldSwitchProps.onTintColor != newSwitchProps.onTintColor) {
_switchView.onTintColor = [UIColor colorWithCGColor:newSwitchProps.onTintColor.get()];
}
// `thumbTintColor`
if (oldSwitchProps.thumbTintColor != newSwitchProps.thumbTintColor) {
_switchView.thumbTintColor = [UIColor colorWithCGColor:newSwitchProps.thumbTintColor.get()];
}
}
- (void)onChange:(UISwitch *)sender
{
if (_wasOn == sender.on) {
return;
}
_wasOn = sender.on;
std::dynamic_pointer_cast<const SwitchEventEmitter>(_eventEmitter)->onChange(sender.on);
}
@end