如何在React Native中将事件从iOS发送到javascript

// MyEventEmitter.h

#import <React/RCTEventEmitter.h>

@interface MyEventEmitter : RCTEventEmitter

- (void)sendEventToJavaScript:(NSDictionary *)eventData;

@end

// MyEventEmitter.m

#import "MyEventEmitter.h"

@implementation MyEventEmitter

RCT_EXPORT_MODULE();

- (NSArray<NSString *> *)supportedEvents {
  return @[@"myEvent"];
}

- (void)sendEventToJavaScript:(NSDictionary *)eventData {
  [self sendEventWithName:@"myEvent" body:eventData];
}

@end

import { NativeEventEmitter, NativeModules } from 'react-native';

const MyEventEmitter = new NativeEventEmitter(NativeModules.MyEventEmitter);

class MyComponent extends React.Component {
  componentDidMount() {
    MyEventEmitter.addListener('myEvent', this.handleEvent);
  }

  componentWillUnmount() {
    MyEventEmitter.removeListener('myEvent', this.handleEvent);
  }

  handleEvent = (eventData) => {
    // 处理接收到的事件数据
  }

  render() {
    // 组件渲染逻辑
  }
}