js —— 判断客户端系统

• 是否是微信页面

  function is_weixin() {
      var ua = window.navigator.userAgent.toLowerCase();
      if (ua.match(/MicroMessenger/i) == 'micromessenger') {
          return true;
      } else {
          return false;
      }
  }
  

• 是否是ios或者andriod

  $(function () {
      var u = navigator.userAgent;
      var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Linux') > -1; //g
      var isIOS = !!u.match(/(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端
      if (isAndroid) {
          window.location.href = 'appDownload.html';
      }
      if (isIOS) {
          window.location.href = 'iosDownload.html';
      }
  });
  

• 是否是pc端

  function IsPC() {
      var userAgentInfo = navigator.userAgent;
      var Agents = ["Android", "iPhone",
                    "SymbianOS", "Windows Phone",
                    "iPad", "iPod"
                   ];
      var flag = true;
      for (var v = 0; v < Agents.length; v++) {
          if (userAgentInfo.indexOf(Agents[v]) > 0) {
              flag = false;
              break;
          }
      }
      return flag;
  }