微信小程序-默认选中状态

<view class="bank_MianBox" id="{{item.id}}" wx:for="{{list}}" bindtap='activeBtn'>

<view class="recharg_wechatEmpty">

<image id="{{item.id}}" catchtap='emptyBtn' hidden='{{emptyShow}}' src="../../images/icon_delete_per@2x.png"></image>

<view class="recharg_wechatText">{{item.bankname}}({{item.cardno}})</view>

</view>

<view class="recharg_wechatIcon">

<image src="../../images/icon_payment_per@2x.png" wx:if="{{item.id==isId}}"></image>

<image src="../../images/icon_payment@2x.png" wx:else></image>

</view>

</view>

 

//判断 wx:if="{{item.id==isId}}"