var wxback = {
    init :function(){
      //隐藏微信分享按钮等
      document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {
        WeixinJSBridge.call('hideToolbar');
        WeixinJSBridge.call('hideOptionMenu');
        WeixinJSBridge.call('hideMenuItems');
      });
      if(getSystem()=="ios"){
        //this.pushHistory();
        /* window.addEventListener("popstate", function(e) { //回调函数中实现需要的功能
          //window.location.href = document.referrer+"&"+Math.floor(Math.random()*1000);
          //history.go(-1);//不管怎么样都是返回到最初的页面返回了n次
          //history.back();//不管怎么样都是返回到最初的页面返回了n次
          //window.location = document.referrer;//上一个页面url
          //WeixinJSBridge.call('closeWindow');//直接关闭页面
        }, false);*/
        var isPageHide = false; 
        window.addEventListener('pageshow', function () { 
         if (isPageHide) {
          window.location.reload(); 
         } 
        }); 
        window.addEventListener('pagehide', function () { 
         isPageHide = true; 
        }); 
      }
    },
    pushHistory :function () {
      var state = { 
        title: document.title, 
        url: location.href 
      }
      window.history.pushState(state, state.title, state.url); 
      console.log(window.history);
    },
}