//获取手机型号
    getOsInfo() {
      var userAgent = navigator.userAgent.toLowerCase();
      var name = 'Unknown';
      var version = 'Unknown';
      if (userAgent.indexOf('win') > -1) {
        name = 'Windows';
        if (userAgent.indexOf('windows nt 5.0') > -1) {
          version = 'Windows 2000';
        } else if (userAgent.indexOf('windows nt 5.1') > -1 || userAgent.indexOf('windows nt 5.2') > -1) {
          version = 'Windows XP';
        } else if (userAgent.indexOf('windows nt 6.0') > -1) {
          version = 'Windows Vista';
        } else if (userAgent.indexOf('windows nt 6.1') > -1 || userAgent.indexOf('windows 7') > -1) {
          version = 'Windows 7';
        } else if (userAgent.indexOf('windows nt 6.2') > -1 || userAgent.indexOf('windows 8') > -1) {
          version = 'Windows 8';
        } else if (userAgent.indexOf('windows nt 6.3') > -1) {
          version = 'Windows 8.1';
        } else if (userAgent.indexOf('windows nt 6.2') > -1 || userAgent.indexOf('windows nt 10.0') > -1) {
          version = 'Windows 10';
        } else {
          version = 'Unknown';
        }
      } else if (userAgent.indexOf('iphone') > -1) {
        name = 'Iphone';
      } else if (userAgent.indexOf('mac') > -1) {
        name = 'Mac';
      } else if (userAgent.indexOf('x11') > -1 || userAgent.indexOf('unix') > -1 || userAgent.indexOf('sunname') > -1 || userAgent.indexOf('bsd') > -1) {
        name = 'Unix';
      } else if (userAgent.indexOf('linux') > -1) {
        if (userAgent.indexOf('android') > -1) {
          name = 'Android';
        } else {
          name = 'Linux';
        }
      } else {
        name = 'Unknown';
      }
      console.log(name,version)
      if(name == 'Iphone' || name == 'Mac') {
        sessionStorage.setItem('system','Iphone')
      } else if (name == 'Android' || name == 'Windows') {
        sessionStorage.setItem('system','Android')
      } else {
        sessionStorage.setItem('system','Android')
      }
      // return { name, version };
    },