ionic header和subheader头部指令

http://www.ionic.wang/js_doc-index-id-21.html

如果应用'bar-subheader'类，就可以成为一个subheader

<ion-header-bar class="bg_fdd000">
    <a class="button button-clear " ui-sref="appliance_repairDeviceOrder">
        <span class="icon ion-ios-arrow-left color_e5005a"></span>
    </a>
    <h1 class="title color_e5005a">选择小区</h1>
</ion-header-bar>

<style>

    .hb.bar .button.button-clear .icon::before, .hb.bar .button.button-clear.icon::before, .hb.bar .button.button-clear.icon-left::before, .hb.bar .button.button-clear.icon-right::before {
        font-size: 14px;
        line-height: 32px;
    }

    .list.district_class .item{
        padding:0;
        width: 100%;
    }

</style>

<ion-header-bar class="bar-subheader hb">
    <div class="button-bar">
        <a class="button button-clear">
            湖南
        </a>
        <a class="button button-clear">
            长沙市
        </a>
        <a class="button button-clear" style="overflow: visible" ng-click="showDistrictList()">
            <span id="btnValue">不限</span><i class="icon ion-arrow-down-b" style="font-size: 14px;"></i>
            <ul class="list absolute district_class" style="z-index: 999;top:105%;left: 0px;width: 105%;display: none">
                <li class="item" ng-click="itemSelected($event)">
                    不限
                </li>
                <li class="item" ng-click="itemSelected($event)">
                    岳麓区
                </li>
                <li class="item" ng-click="itemSelected($event)">
                    芙蓉区
                </li>
                <li class="item" ng-click="itemSelected($event)">
                    天心区
                </li>
                <li class="item" ng-click="itemSelected($event)">
                    开福区
                </li>

                <li class="item" ng-click="itemSelected($event)">
                    雨花区
                </li>
                <li class="item" ng-click="itemSelected($event)">
                    长沙县
                </li>
                <li class="item" ng-click="itemSelected($event)">
                    望城县
                </li>
            </ul>
        </a>
    </div>
</ion-header-bar>