mui的Picker要怎么清空里面的数据呢

不用清空，要自己重新写一下就可以了，防止多次加载

mui.init();  
            mui.plusReady(function(){  
                document.getElementById('showCityPicker').addEventListener('tap', function()  
                {  
                    var picker = new mui.PopPicker({layer: 2});  
                    picker.setData(cityData);  
                    picker.show(function (selectItems) {  
                        $("#showCityPicker").html("<font id='addressRegion'>"+selectItems[0].text+"</font><font id='addressLocality'>"+selectItems[1].text+"</font>");  
                    })  
                });  

                document.getElementById('showUserPicker').addEventListener('tap', function()  
                {  
                    var addressRegion = $("#addressRegion").html();  
                    var addressLocality = $("#addressLocality").html();  
                    mui.getJSON('',  
                    {},  
                    function(data){  
                        if (data.status == "success")  
                        {  
                            //普通示例  
                            gitcity(data.data);  
                        }  
                        else  
                        {  
                            mui.toast("没有相关数据");  
                        }  
                    });  

                });  

                function gitcity(argument) {  
                    var picker = new mui.PopPicker();  
                    picker.setData(argument);  
                    picker.show(function (selectItems) {  
                        mui.getJSON('',  
                        {name:},  
                        function(data){  
                            $("#showUserPicker").html(data.name);  
                            $('#name').html(data.name);  
                            $('#streetAddress').html(data.streetAddress);  
                            $('#phone').html(data.phone);  
                            $('#postalCode').html(data.postalCode);  
                        });  
                    });  
                }  
            });