dtPicker点击确定按钮后不关闭

var picker = new mui.DtPicker({"type":"month"});  
        picker.show(function(rs) {  
            var y = rs.y.value;  
            var m = rs.m.value;       
            var text = y+'年'+m+'月';  
            document.getElementsByClassName("month-full")[0].innerText = text;  
            newDate = m+'/1/'+y;  
            new xCalendar('#calendar1', {date: newDate})  
            date = rs.value+'-01'; //默认为选择月份的1号           
            picker.dispose();  
            plus.nativeUI.showWaiting();  
            initData();           
            $("td[data-date=\""+newDate+"\"]").addClass("active");  
            //return true;  
        });

有时候选择月份之后弹出框不自动缩回去是为什么