Reactnative可以调用原生模块，原生模块也可以给JavaScript发送事件通知.最好的方法是继承RCTEventEmitter.自定义继承自PushEventEmitter的子类RCTEventEmitter.

#import <Foundation/Foundation.h>#import <React/RCTBridgeModule.h>#import <React/RCTEventEmitter.h>@interface PushEventEmitter : RCTEventEmitter <RCTBridgeModule>- (void)addEventReminderReceived:(NSNotification *)notification;@end

实现supportedEvents方法

#import "PushEventEmitter.h"@implementation PushEventEmitter+ (id)allocWithZone:(NSZone *)zone { static PushEventEmitter *sharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [super allocWithZone:zone]; }); return sharedInstance;}RCT_EXPORT_MODULE();- (NSArray<NSString *> *)supportedEvents{ return @[@"EventReminder"];}- (void)addEventReminderReceived:(NSNotification *)notification { [self sendEventWithName:@"EventReminder" body:@{@"name": @"FlyElephant"}];}@end

React native 设置:

import { NativeModules, NativeEventEmitter,} from 'react-native';const PushEventEmitter = NativeModules.PushEventEmitter;const emitterManager = new NativeEventEmitter(PushEventEmitter);

订阅通知和移除通知:

componentDidMount() { subscription = emitterManager.addListener( 'EventReminder', (reminder) => console.log('JavaScript接收到通知:'+reminder.name) ); } componentWillUnmount(){ subscription.remove();// 移除通知 }

调用测试:

PushEventEmitter *eventEmitter = [PushEventEmitter allocWithZone:nil];

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