<view class="list"  >

        <label for="" capture-catch:touchstart="changclor"  mut-bind:touchend="colocolor"  style="background-color: {{bgcolor}};"> {{item}}</label>

        <label for="" capture-catch:touchstart="changclor"  mut-bind:touchend="colocolor"  style="background-color: {{bgcolor}};"> {{item}}</label>

</view>

data: {

    list:['1','2','3','4'],

    bgcolor:'',

  },

  changclor(){

    this.setData({

      bgcolor:'red'

    })

  },

  colocolor(){

    this.setData({

      bgcolor:''

    })

  },