把按鈕放在picker區域里就好了 picker本身就是一個區域
<picker mode = "selector" class='info' bindchange="bindPickerChange" value="{{index_member}}" range="{{members}}" range-key="name">
//下面可以是圖片或按鈕
<image class="state" src="../../assets/images/tast.png"></image>
</picker>