js的事件被触发多次

js的事件被触发多次

本文介绍了在我的意见Backbone.js的事件被触发多次的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我可能就如何落实Backbone.js的一种误解,因为我所有的观点,即支持多种模式(例如,产品认为,可以同时显示多个产品),将发送事件,这是每个视图该会话中创建。

因此​​,在下面的例子中,当我点击#redirect_product链接时,redirect_product取决于多少产品我见过多次调用。如果我浏览过5个产品,6日点击我会得到6警报。

这是怎么回事?

  505 / ****************产品视图**************** /
  506 App.Views.Product = Backbone.View.extend({
  507 EL:$('#content_sec'),
  508
  509事件:{
  510点击#redirect_product:redirect_product
  511},
  512
  513初始化:功能(选件){
  514 this.model = this.options.model;
  515 this.render();
  516
  517},
  518
  519渲染:功能(){
  520 $(this.el).empty();
  521 $('#product_detail_template')TMPL(this.model.toJSON())appendTo($(this.el))。。
  522
  523
  524 //激活的Facebook按钮
  如果525(typeof运算FB!=未定义){
  526 FB.XFBML.parse(的document.getElementById('item_share'))
  527}
  528
  529 wishlist.init();
  530回本;
  531},
  532
  533 redirect_product:功能(){
  534 //发送被点击由谁什么样的产品数据
  535的警报('你好');
  536
  537
  538产品用户//打开新窗口
  539 VAR external_link = this.model.get(产品)的属性['外部链接'];
  540 window.open(external_linkexternal_site);
  541
  542},
  543});


解决方案

的问题,我想,那是你使用相同的为您的所有意见。

当你创建一个新的产品,做这样的事情:

  $('#content_sec')追加('< D​​IV CLASS =ProductView的>< / DIV>');
变种产品=新产品();
VAR视图=新的ProductView({模式:产品,EL:$('。ProductView的:去年')});

一旦每个产品都有自己的适用范围,那么事件将正常工作。

I may have a misunderstanding on how to implement backbone.js, because all of my views that support multiple models (for example, a "Product" view that that can display multiple products), will send events to every view that was created in that session.

So in the example below, when I click the #redirect_product link, the "redirect_product" is called multiple times depending on how many products i've seen. If I've viewed 5 products, on the 6th click I will get 6 alerts.

What's going on here?

  505     /****************PRODUCT VIEW****************/
  506     App.Views.Product = Backbone.View.extend({
  507         el: $('#content_sec'),
  508
  509         events: {
  510             "click #redirect_product": "redirect_product",
  511         },
  512
  513         initialize: function(options) {
  514             this.model = this.options.model;
  515             this.render();
  516
  517         },
  518
  519         render: function() {
  520             $(this.el).empty();
  521             $('#product_detail_template').tmpl(this.model.toJSON()).appendTo($(this.el));
  522
  523
  524             //Activate facebook buttons
  525             if (typeof FB  != "undefined"){
  526                         FB.XFBML.parse(document.getElementById('item_share'))
  527             }
  528
  529             wishlist.init();
  530             return this;
  531         },
  532
  533         redirect_product: function() {
  534             //Send data on what product being clicked by whom
  535             alert('hi');
  536
  537
  538             //Open new window with product for user
  539             var external_link = this.model.get('product').attributes['External Link'];
  540             window.open(external_link, "external_site");
  541
  542         },
  543     });
解决方案

The problem, I think, is that your using the same el for all your views.

When you create a new Product, do something like this:

$('#content_sec').append('<div class="productView"></div>');
var product = new Product();
var view = new ProductView({model: product, el: $('.productView:last')});

Once each product has its own scope, then the events will work as expected.

这篇关于在我的意见Backbone.js的事件被触发多次的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-31 04:08