移動端window.history.back()無效的替代方案

移動端使用window.history.back()無法傳回上一頁，網上搜到的解決方法是

window.location.href = document.referrer;
           

但是如果是在兩個頁面來回切換幾次，傳回時就會陷入無限循環。

沒辦法，隻能自己動手了，自定義一套解決方案。

解決思路是把通路過的url放到數組裡面，再存儲到localStorage裡面，傳回時從裡面讀取最後一個url，讀取後再把最後一個url移除。具體實作如下

//曆史記錄
var jndx_currenturl = window.location.href;
var jndx_historyarr = new Array();
var jndx_historystr = "";
if(jndx_currenturl.indexOf("/ydsiteb/default/index")<0){
	jndx_historystr = localStorage.getItem("jndx_historystr");
}
if(jndx_historystr.length>0){
    jndx_historyarr = JSON.parse(jndx_historystr);
}
var jndx_lasthisurl = "";
var jndx_historynum = jndx_historyarr.length;
if(jndx_historynum>0){
    jndx_lasthisurl = jndx_historyarr[jndx_historynum];
}
if(jndx_lasthisurl!=jndx_currenturl && jndx_historyarr.indexOf(jndx_currenturl)<0){
    jndx_historyarr.push(jndx_currenturl);
}
localStorage.setItem("jndx_historystr",JSON.stringify(jndx_historyarr));

//傳回上頁
function gotoback(){
    var jndx_prevurl = jndx_historyarr.pop();
    if(jndx_prevurl==jndx_currenturl){
        jndx_prevurl = jndx_historyarr.pop();
    }
    if(!jndx_prevurl){
        jndx_prevurl = "/ydsiteb/default/index?randnum="+ Math.random();
    }
    localStorage.setItem("jndx_historystr",JSON.stringify(jndx_historyarr));
    window.location.href = jndx_prevurl;
    return false;
}

//傳回首頁
function gotohome(){
    window.location.href = "/ydsiteb/default/index?randnum="+ Math.random();
    return false;
}