图一是电脑上面，图二是用安卓手机测试

<map id="map4select" class='map' longitude="{{longitude}}" latitude="{{latitude}}" markers="{{markers}}" scale="20" style="width:100%;height:100%" bindregionchange="regionchange" controls="{{controls}}">

<cover-view class="coverImage">

<cover-image src="/assets/img/icon_button.png" class="coverImage1">

</cover-image>

<view catchtap="{{OK?'goSubmit':''}}" class="coverImage2" >

生成DNA码

</view>

</cover-view>

</map>