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Reactnative-iOS回调Javascript的方法

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0711

这篇文章主要介绍了Reactnative-iOS回调Javascript的方法，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

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.

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#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

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#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:

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

订阅通知和移除通知:

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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:

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PushEventEmitter *eventEmitter = [PushEventEmitter allocWithZone:nil];

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持米米素材网。

原文链接：https://www.jianshu.com/p/027885fe88f5