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Reactnative-iOS回調(diào)Javascript的方法

 更新時(shí)間：2018年09月03日 10:07:31   作者：FlyElephant  
這篇文章主要介紹了Reactnative-iOS回調(diào)Javascript的方法，小編覺得挺不錯(cuò)的，現(xiàn)在分享給大家，也給大家做個(gè)參考。一起跟隨小編過(guò)來(lái)看看吧

Reactnative可以調(diào)用原生模塊，原生模塊也可以給JavaScript發(fā)送事件通知.最好的方法是繼承RCTEventEmitter.自定義繼承自PushEventEmitter的子類RCTEventEmitter.

#import <Foundation/Foundation.h>
#import <React/RCTBridgeModule.h>
#import <React/RCTEventEmitter.h>

@interface PushEventEmitter : RCTEventEmitter <RCTBridgeModule>

- (void)addEventReminderReceived:(NSNotification *)notification;

@end

實(shí)現(xiàn)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 設(shè)置:

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

const PushEventEmitter = NativeModules.PushEventEmitter;

const emitterManager = new NativeEventEmitter(PushEventEmitter);

訂閱通知和移除通知:

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

  }
  componentWillUnmount(){
    subscription.remove();// 移除通知
  }

調(diào)用測(cè)試:

PushEventEmitter *eventEmitter = [PushEventEmitter allocWithZone:nil];

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