微信小程序点击button或view后选中其它反选

作者：蜗牛呆呆，来自原文地址

如果需要实现进来进行给按钮加上买一送一的样式，或者单击就选中单个按钮，只能靠css结合js进行控制了，小程序暂时没有这样的控件。 

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2018-7-15 05:37 上传

微信小程序进来的时候自动进行按钮样式的初始化，这个需要一个字段做判断，加上正则表达式wxml文件：

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

wxss文件
.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%;
}

现在的方法把集合进行循环，然后获取当前点击的这个按钮进行比较，然后进行样式的修改

      for (var i = 0; i < this.data.liuliangItems.length; i++) {
        if (e.target.dataset.orderid == this.data.liuliangItems[i].id) {
          txtArray1[i] = {
            id: this.data.liuliangItems[i].id, changeColor: true,
            price: this.data.liuliangItems[i].price, name: this.data.liuliangItems[i].name,
            one2one: this.data.liuliangItems[i].one2one
          }
        } else {
          txtArray1[i] = {
            id: this.data.liuliangItems[i].id, changeColor: false,
            price: this.data.liuliangItems[i].price, name: this.data.liuliangItems[i].name,
            one2one: this.data.liuliangItems[i].one2one
          }
        }
      }