– 问题 --我现在点击一个商品的加减，其他商品的加减一起加一起减，我如何点击单个商品是，其他商品加减不懂，只有对应的商品的加减动。-- html –

<view class=“container”>

          <view wx:for="{{userIndexProList}}" wx:key=“this” wx:for-item=“item”>

            <view style=‘margin-top:35rpx;’ class=‘item_container’ bindtap=‘itemSelected’ data-index=’{{index}}’>

              <image class=‘select_icon’ src="{{item.isSelected?’/images/wmn_select_have.png’:’/images/wmn_select_none.png’}}" style=‘width:40rpx;margin-right:30rpx;’></image>

            </view>

            <view class=“carts-text” style=‘width:calc(100% - 35rpx);’>

              <text class=“carts-title”>{{item.product.title}}</text>

              <text class=“carts-title”>{{item.product.items}}</text>

              <view class=“carts-subtitle”>

                <text class=“carts-price”>￥{{item.product.price}}</text>

                <text bindtap=“bindMinus” data-index="{{index}}">-</text>

                <text>{{num}}</text>

                <text bindtap=“bindPlus” data-index="{{index}}">+</text>

              </view>

            </view>

          </view>

        </view>

– js –

data: {

    //默认是1 

    num: 1,

  },

//数量加

  bindPlus: function() {

    var num = this.data.num;

    num++;

    this.setData({

      num: num

    });

  },

  //数量减

  bindMinus: function() {

    var num = this.data.num;

    if (num > 1) {

      num–;

    }

    this.setData({

      num: num

    });

  }