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.
|
1
2
3
4
5
6
7
8
9
|
#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
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
#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:
|
1
2
3
4
5
6
7
8
|
import { NativeModules, NativeEventEmitter,} from 'react-native';const PushEventEmitter = NativeModules.PushEventEmitter;const emitterManager = new NativeEventEmitter(PushEventEmitter); |
订阅通知和移除通知:
|
1
2
3
4
5
6
7
8
9
10
|
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:
|
1
|
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服务器之家。
原文链接：https://www.jianshu.com/p/027885fe88f5
