用hidden切换地图和列表，scroll-view列表的下拉刷新失效。

<!-- 正常 -->
<!-- <view class="content" wx:if="{{type == 'list'}}">  
    <scroll-view scroll-y="true" refresher-enabled="{{true}}" refresher-triggered="{{triggered}}" 
bindrefresherrefresh="refresh" >
.......
    </scroll-view>
<!-- ---------------------------------------------------------------------------------------- -->
<!-- 失效 -->
<view class="content" hidden="{{type == 'list'? false: true}}">
    <scroll-view scroll-y="true" refresher-enabled="{{true}}" refresher-triggered="{{triggered}}" 
bindrefresherrefresh="refresh">
.......
    </scroll-view>
</view>