小程序上下移动切换位置

 
          {{item.name}}
          
            
          
          
            
          
        

data{
    companyData:[
        {
            id:0,
            name:'产品1'
        },
        {
            id:1,
            name:'产品2'
        },
        {
            id:2,
            name:'产品3'
        },
        {
            id:3,
            name:'产品4'
        },
        {
            id:4,
            name:'产品5'
        }
    ]
}

//位置向上移动
topClick: function(e) {
    var that = this
    var index = e.currentTarget.dataset.index
    var one = that.data.companyData[index]
    var two = that.data.companyData[index - 1]
    var index2 = index - 1
    var data1 = "companyData[" + index + "]"
    var data2 = "companyData[" + index2 + "]"
    that.setData({
      [data1]: two,
      [data2]: one
    })
  },
  // 位置向下移动
  bottomClick: function(e) {
    var that = this
    var index = e.currentTarget.dataset.index
    var one = that.data.companyData[index]
    var two = that.data.companyData[index + 1]
    var index2 = index + 1
    var data1 = "companyData[" + index + "]"
    var data2 = "companyData[" + index2 + "]"
    that.setData({
      [data1]: two,
      [data2]: one
    })
  }