<block wx:for="{{pres}}">  <view class='foot_tab' data-id="{{index}}" style="{{index==id? 'color:rgb(91, 207, 97)':'color:#ddd'}}" bindtap='changeColor'>  <view class="icon">   <icon class="iconfont {{item.img_type}}"></icon>  </view>  <view>{{item.text}}</view>  </view> </block>

var id;Page({ data: { pres: [{ img_type: 'icon-baomihua', text: '電影' }, { img_type:"icon-yonghu",text:'我的'}], id:0 },changeColor: function(e){ var id=e.currentTarget.dataset.id; this.setData({  id:id, });  }})

.footer { width: 100%; height: 50px; position: fixed; bottom: 0px; display: flex; flex-direction: row; justify-content: space-around; border-top: 1px solid rgb(226, 226, 226);} .foot_tab { width: 40px; height: 50px; font-size: 12px; display: flex; align-items: center; flex-direction: column;} .icon { width: 30px; height: 30px; /* background-color: #ccc; */ text-align: center;}

@font-face { font-family: 'iconfont'; /* project id 794639 */ src: url('//at.alicdn.com/t/font_794639_1jyu0w9tzqh.eot'); src: url('//at.alicdn.com/t/font_794639_1jyu0w9tzqh.eot?#iefix') format('embedded-opentype'), url('//at.alicdn.com/t/font_794639_1jyu0w9tzqh.woff') format('woff'), url('//at.alicdn.com/t/font_794639_1jyu0w9tzqh.ttf') format('truetype'), url('//at.alicdn.com/t/font_794639_1jyu0w9tzqh.svg#iconfont') format('svg');} .iconfont { font-family:"iconfont" !important; font-size:60rpx; font-style:normal; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;} .icon-baomihua:before{content: '/e622';}.icon-yonghu:before{content: '/e600';}