方法一：
<!-- index.wxml --><view class='top'> <view class="{{ currentTab == index ? 'active' : '' }}" wx:for="{{top}}" wx:key="{{lalala}}" bindtap="{{ currentTab != index ? 'navbarTap':'' }}" id="{{index}}" >{{item}}</view></view>/* index.wxss */.top{ display: flex; justify-content: space-around; padding: 30rpx 40rpx; box-sizing: border-box; font-size: 35rpx;}.active{ color:red;}//index.jsdata: { top: ["品牌", "CPU类型", "屏幕尺寸", "产品定位"], // 默认显示的 currentTab: 0, index: 0, },navbarTap: function (e) { var that = this; console.log(e); this.setData({ currentTab: e.currentTarget.id, //按钮CSS变化 })},方法二：
<!-- index.wxml --><view class='top_list' > <view class="top_item{{item == topitem?'active':''}}" wx:for="{{top}}" wx:key="{{index}}" bindtap='bindtop' data-classify="{{item}}" >{{item}}</view></view>//index.jsdata: { top: ["品牌", "CPU类型", "屏幕尺寸", "产品定位"], topitem: '品牌', //默认显示的},bindtop: function (event) { var classify = event.currentTarget.dataset.classify; var that = this; console.log(classify) //当前点击项 this.setData({ topitem: classify, //更新 })},
