ios原生向react-native发送事件通知

直接上代码：

第一步：原生里边新建oc类，xxx.h

#import <React/RCTBridgeModule.h>

#import <React/RCTEventEmitter.h>

NS_ASSUME_NONNULL_BEGIN

@interfaceMySendMessageModule : RCTEventEmitter

-(void)sendMessageToRn:(NSString*)isBack;

(id)allocWithZone:(NSZone*)zone;

@end

NS_ASSUME_NONNULL_END

xxx.m

@implementationMySendMessageModule

//@synthesize bridge = _bridge;

RCT_EXPORT_MODULE(mySendModule)

(id)allocWithZone:(NSZone *)zone {

staticMySendMessageModule *sharedInstance =nil;

staticdispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

sharedInstance = [super allocWithZone:zone];

});

returnsharedInstance;

}

-(NSArray<NSString*> *)supportedEvents

{

return @[@"backMessage"];

}

-(void)sendMessageToRn:(NSString *)isBack

{

[selfsendEventWithName:@"backMessage"body:nil];

}

@end

其中：

(id)allocWithZone:(NSZone *)zone

-(NSArray<NSString*> *)supportedEvents

这两个函数时必须实现的，supportedEvents里边定义了你所有要向react-native发送的消息事件。

-(void)sendMessageToRn:(NSString *)isBack，则是向react-native实际的发送消息，这个可以根据自己的需要来定义。

第二步，原生如何调用上面的发送消息的接口

在需要发送消息的地方如下使用：

MySendMessageModule *manager = [MySendMessageModule allocWithZone:nil];

[manager sendMessageToRn:@"yes"];

第三步：在react-native中如下使用：

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

let iOSExport =NativeModules.mySendModule;

const managerEmitter =new NativeEventEmitter(iOSExport);

const subscription = managerEmitter.addListener(

'backMessage',//原生发 送的消息事件

(reminder) => {

//此处做你收到事件后，想做的事情

}

);