jQuery函数不适用于Hammer.js

问题描述

我正在尝试将press添加到jQuery选择器.我在同一文档中有很多元素，所以我不能为每个元素使用ID.我由$(selector)[i]尝试过，就像解释的 .

I am trying to add press to jQuery selector. I have many elements on same document, So I can not use IDs for each. I tried by $(selector)[i] as like explained here.

var selectProduct = $('.mh60 a');
for (var i = 0; i < selectProduct.length; i++) {
  Hammer(selectProduct[i]).on("press", function() {
     $(selectProduct[i]).addClass('active');
  });
}

它没有产生任何错误并且无法正常工作.我没有得到我在这里想念的东西.

It's not producing any error and not working. I didn't get what I am missing here.

当我尝试通过console.log(selectProduct[i]);登录selectProduct[i]时，它会给出undefined结果.

And when I try to log selectProduct[i] by console.log(selectProduct[i]); it gives undefined result.

更新1

当我删除for循环并仅使用selectProduct[0]，selectProduct[1]时，...可以正常工作，但是使用selectProduct[i]时，它却无法正常工作，所以我认为问题出在for循环上.但是我不明白.

When I remove for loop and just use selectProduct[0] , selectProduct[1] , ... it's working but with selectProduct[i] , it's not working, So I think problem is on for loop. But I didn't get it.

更新2

我还尝试了 jQuery插件，同样的问题

I also tried with jQuery plugin, same problem

更新3

我再次尝试使用each()，同样的问题.它显示控制台消息，但addClass()不起作用.我想问题出在this函数，它不返回当前元素.

Again I tried with each(), same problem. It print the console message but addClass() is not working. I guess the problem is with this function which is not returning the current element.

$('.mh60 a').each(function(){
    var mc = new Hammer(this);
    mc.on("press", function() {
      console.log('Double tap!');
      $(this).addClass('active');
    });
 });

推荐答案

最后，我通过使用each函数

$('.mh60 a').each(function(){
    var mc = new Hammer(this);
    var currentEle = $(this);
    mc.on("press", function() {
      currentEle.addClass('active');
    });
 });

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