Implementation of code for group sending function in small program

巴扎黑
Release: 2017-09-12 10:06:57
Original
4107 people have browsed it

微信小程序中实现一对多发消息详解及实例代码

微信小程序中各个界面之间的传值和通知比较蛋疼。所以模仿了iOS中的通知中心,在微信小程序中写了一套类似的通知中心。

通知中心可以做到:1对多发消息,传递object。使用十分简洁。

使用时,在需要接收消息的界面注册一个通知名。然后在需要发消息的界面post这个通知名就可以了。可以在多个界面注册同一个通知名。这样就可以1对多发消息。

使用方法:

1:在app.js中引用notification.js

var notificationCenter = require('/utils/notification.js'); //这里请改为你的绝对路径
Copy after login

2:在app.js中添加:

App({
  onLaunch: function (){
     this.notificationCenter = notificationCenter.center();
  },
  notificationCenter:null,
})
Copy after login

3: 接收通知的page.js中注册

PageA.js:

var app = getApp();
Page({
 onLoad:function(options){
 app.notificationCenter.register("一个通知名称",this,"didReceviceAnyNotification");
 },
 didReceviceAnyNotification:function(name,content){
  console.log("接收到了通知:",name, content);
 },
})
Copy after login

4: 发出通知的page.js中

PageB.js 任意函数

var app = getApp();
Page({
 anyFunction:function(){
  app.notificationCenter.post("通知名称",{
    //任意通知object
  })  ;
 },
})
Copy after login

实现:

文件下载:http://xiazai.jb51.net/201702/yuanma/wxappNotificationCenter-master(jb51.net).rar

var notificationCenter = {


notificationCenter:{},


// 向通知中心注册一个监听者。
// name: 监听的通知名称
// observer: 监听者
// action: 监听者收通知时调用的方法名,
// func: 监听者收到通知时调用的函数,
// action func 2选1
register:function(name,observer,action,func){
  if (!name || !observer) return;
  if (!action && !func) return;


  console.log("注册通知:",name,observer);


  var center = this.notificationCenter;
  var objects = center[name];
  if (!objects){
    objects = [];
  }
  this.remove(name,observer);
  objects.push({
    observer:observer,
    action:action,
    func:func
  });
  center[name] = objects;
},
// 从通知中心移除一个监听者
remove:function(name,observer){
  if (!name || !observer) return;


  var center = this.notificationCenter;
  var objects = center[name];
  if (!objects){
    return;
  }


  var idx;
  var object;
  for(idx = 0;idx<objects.length;idx++){
    var obj = objects[idx];
    if (obj.observer == observer){
    object = obj;
    break;
    }
  }
  if (object){
    objects.splice(idx,1);
  }
  center[name] = objects;
},
// 通过通知中心发出通知
// name: 通知名称
// notification: 通知内容
post:function(name,notification){
  if (!name) return;

  console.log("准备发出通知:",name,notification);

  var center = this.notificationCenter;
  var objects = center[name];
  if (!objects){
    objects = [];
  }
  objects.forEach(function(object){
    var observer = object.observer;
    var action = object.action;
    var func = object.func;

    if (observer && action){
      func = observer[action];
    }
    func(notification);
  });
  console.log("完成向 ",objects.length," 个监听者发出通知:",name);
}
}
function center(){
  return notificationCenter;
}
module.exports.center = center;
Copy after login

The above is the detailed content of Implementation of code for group sending function in small program. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!