微信小程序中实现一对多发消息详解及实例代码

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

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

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); },})

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

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1register: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;