ios上拉加载后显示没有更多数据后无法重置的问题

(function($, ze, win) {  
    //刷新容器  
    var pullrefresh = document.getElementById("pullrefresh");  
    //起始页  
    var startPage = 0;  
    //每页页数  
    var pageSize = 10;  
    //上拉还是下拉的标识符 true为下拉，false为上拉  
    var flag = true;  

    $.init({  
        pullRefresh : {  
            container:"#pullrefresh",  
            down : {  
                callback : pullDownFresh  
            },  
            up : {  
//              contentrefresh: "正在加载...",  
                callback : pullUpFresh  
            }  
        }  
    });  

    $.plusReady(function(){  

    });  

    function pullDownFresh(){  
        //每次下拉刷新先清空list  
        startPage = 1;  
        flag = true;  
        $("#pullrefresh").pullRefresh().refresh(true);  
        ze("#listdata").html("");  
        setTimeout(function() {  
            suqiu_ajax();  
        }, 500);  
    }  

    function pullUpFresh(){  
        startPage++;  
        flag = false;  
//      $("#pullrefresh").pullRefresh().refresh(true);  
        setTimeout(function() {  
            suqiu_ajax();  
        }, 500);  
    }  

    $.plusReady(function(){  
        //首次进入刷新  
        loadPage();  
    });  

    win.loadPage = function(){  
        ze("#listdata").html("");  
        startPage = 0;  
        pullUpFresh();  
    }   

    win.suqiu_ajax = function(){  
        suqiu_data = {   
            methodName: interfaceUrls.Appeal_getAppealList,   
            startPage: startPage,   
            pageSize: pageSize   
        };  
        if(flag){  
            my_ajax(suqiu_data,suqiu_success,xsuqiu_error);  
        }else{  
            my_ajax(suqiu_data,suqiu_success,ssuqiu_error);  
        }  
    }  

    win.suqiu_success = function(response){  
        console.log(JSON.stringify(response));  
        if(response.returnCode == 1){  
            if(response.AppealList){  
                var litemplate = "<li class='mui-table-view-cell' id='{{rowGuid}}'>"+  
                                    "<div class='zjg-person zjg-f-l'>"+  
                                        "<a class='zjg-person-link' href='#'>"+  
                                            "<i class='zjg-person-icon'></i>"+  
                                            "<h3>{{displayname}}</h3>"+  
                                        "</a>"+  
                                    "</div>"+  
                                    "<div class='zjg-appeal-con'>"+  
                                        "<div class='zjg-title-box mui-clearfix'>"+  
                                            "<div class='zjg-appeal-status mui-clearfix'>"+  
                                                "<i class='zjg-appeal-dealing-iron'></i>"+  
                                                "<span class='zjg-appeal-dealing'>处理中</span>"+  
                                            "</div>"+  
                                            "<h2 class='zjg-appeal-title zjg-color-orange'>{{title}}</h2>"+  
                                        "</div>"+  
                                        "<p class='zjg-appeal-p'>{{rwInfo}}</p>"+  
                                        "<span class='zjg-appeal-date'>{{startDate}}</span>"+  
                                    "</div>"+  
                                "</li>";  
                var litemplate1 = "<li class='mui-table-view-cell' id='{{rowGuid}}'>"+  
                                    "<div class='zjg-person zjg-f-l'>"+  
                                        "<a class='zjg-person-link' href='#'>"+  
                                            "<i class='zjg-person-icon'></i>"+  
                                            "<h3>{{displayname}}</h3>"+  
                                        "</a>"+  
                                    "</div>"+  
                                    "<div class='zjg-appeal-con'>"+  
                                        "<div class='zjg-title-box mui-clearfix'>"+  
                                            "<div class='zjg-appeal-status mui-clearfix'>"+  
                                                "<i class='zjg-appeal-finished-iron'></i>"+  
                                                "<span class='zjg-appeal-finished'>已办结</span>"+  
                                            "</div>"+  
                                            "<h2 class='zjg-appeal-title zjg-color-orange'>{{title}}</h2>"+  
                                        "</div>"+  
                                        "<p class='zjg-appeal-p'>{{rwInfo}}</p>"+  
                                        "<span class='zjg-appeal-date'>{{startDate}}</span>"+  
                                    "</div>"+  
                                "</li>";  
                ze.each(response.AppealList, function(key, value) {   
                    if (value.clStatus == 0) {  
                        var output = Mustache.render(litemplate, value);   
                    } else {   
                        var output = Mustache.render(litemplate1, value);   
                    }   
                    ze("#listdata").append(output);   
                });  
                                //加载完成后执行end方法  
                if (flag) {   
                    $(pullrefresh).pullRefresh().endPulldownToRefresh();   
                } else {   
                    $(pullrefresh).pullRefresh().endPullupToRefresh(false);   
                }   
            }else{  

                                //如果没有数据了，上拉加载提示没有数据  
                if (flag) {   
                    $(pullrefresh).pullRefresh().endPulldownToRefresh();   
                } else {   
                    $(pullrefresh).pullRefresh().endPullupToRefresh(true);   
                }   
            }  
            //先移除之前绑定的事件，再进行绑定  
            ze(".mui-table-view-cell").unbind();  
            //列表绑定点击监听  
            ze(".mui-table-view-cell").on('tap',function(){  
                //将页面内容存入html中  
                var html = this.innerHTML;  
                plus.storage.setItem("appeal_html",html);  
                plus.storage.setItem("appeal_id",this.id);  
                closeAndOpenPage("appeal-detail.html","appeal-detail");  
//              callEvent("appeal-detail","refresh",{  
//                  id:this.id,  
//                  con:html  
//              });  
            });  

        }else{  
            if (flag) {   
            $(pullrefresh).pullRefresh().endPulldownToRefresh();   
            } else {   
            $(pullrefresh).pullRefresh().endPullupToRefresh(false);   
            }   
        }  
    }  
    //下拉错误  
    win.xsuqiu_error = function(){  
        //请求超时时，也要关闭  
        if(flag){  
            $(pullrefresh).pullRefresh().endPulldownToRefresh();  
        }else{  
            $(pullrefresh).pullRefresh().endPullupToRefresh(false);  
        }  
    }  
    //上拉错误  
    win.ssuqiu_error = function(){  
        //请求超时时，将起始页-1，防止出现下次加载到第二页的情况  
        startPage--;  

        if(flag){  
            $(pullrefresh).pullRefresh().endPulldownToRefresh();  
        }else{  
            $(pullrefresh).pullRefresh().endPullupToRefresh(false);  
        }  
    }  

    //添加刷新事件  
    win.addEventListener("myRefresh",function(){  
        loadPage();  
    });  

})(mui, Zepto, window);

我的想法是上拉没有数据的时候，调用$(pullrefresh).pullRefresh().endPullupToRefresh(true); 这个方法让他显示没有更多数据，然后在我再次下拉加载的时候，调用$("#pullrefresh").pullRefresh().refresh(true);这个方法将上拉重置，在android上可以正常实现，但是在ios上，当上拉到没有数据后再下拉，不能重置，还是显示没有更多数据，而且，下拉也会无法正常获取数据，请问这是什么问题？