Explication détaillée d'exemples de développement de mini-programmes pour implémenter la fonction de sélection inverse après avoir cliqué sur le contrôle.

   <block wx:for="pw_liuliangItems">
      <block wx:if="pw_item.one2one == 1">
       <button class="pw_item.changeColor?'selected2':'selected1'" type="default" id="pw_item.price" data-id="pw_item.name" data-one="pw_item.one2one" data-orderid="pw_item.id" data-number="1" bindtap="setPrice">pw_item.name</button>
      </block>
      <block wx:else>
       <button class="pw_item.changeColor?'selected':'normal'" type="default" id="pw_item.price" data-id="pw_item.name" data-one="pw_item.one2one" data-orderid="pw_item.id" data-number="1" bindtap="setPrice">pw_item.name</button>
      </block>
     </block>

.normal{
 box-sizing: border-box;
 flex: 0 0 21%;
 margin: 5px 5px;
 height: 50px;
 color:#1aad19;
 border:1px solid #1aad19;
 background-color:transparent;
}
.selected{
 box-sizing: border-box;
 flex: 0 0 21%;
 margin: 5px 5px;
 height: 50px;
 background-color: #F75000;
 color: white;
}
.selected1{
 box-sizing: border-box;
 flex: 0 0 21%;
 margin: 5px 5px;
 height: 50px;
 background-color: transparent;
 border:1px solid #1aad19;
 color:#1aad19;
 background-image: url(https://wxcx.llzt.net/images/hot.png) ;
 background-position:31px 0px;
 background-repeat:no-repeat;
 background-size:62%;
}
.selected2{
 box-sizing: border-box;
 flex: 0 0 21%;
 margin: 5px 5px;
 height: 50px;
 background-color: #F75000;
 color: white;
 background-image: url(https://wxcx.llzt.net/images/hot.png);
 background-position:31px 0px;
 background-repeat:no-repeat;
 background-size:62%;
}

   for (var i = 0; i < this.data.liuliangItems.length; i++) {
    if (e.target.dataset.orderid == this.data.liuliangItems