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];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编程网。
