//记录进入app时的url
   if (typeof window.entryUrl === 'undefined' || window.entryUrl === '') {
        window.entryUrl = location.href.split('#')[0]
    }
   var isIOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端
    if (isIOS) {
      url=window.entryUrl
    }else{
      url = window.location.href;
    }
  var data = {
    url: url
  };
 请求后台接口
  post('main/getShareSign', data)

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