微信小程序—onReachBottom（触底加载数据）

    onReachBottom: function () {
        let that = this

        that.setData({//页面触底后 显示隐藏的加载图片
            touch:true
        })

        //动画加载实例
        let option = {
            duration: 3000,
            timingFunction: 'linear'
        }
        let lanimation = wx.createAnimation(option)
        lanimation.rotate(180*10).step()
        that.setData({
            rotate: lanimation.export()
        });
        setTimeout(function(){
            if(that.data.shopCase.length%6 !== 0){//判断当前加载的数据是否小于6
                that.setData({
                    rotate: lanimation.export(),
                    touch2:true,
                    touch:false
                })
            }else{
                let dataSide = that.data.dataSide
                dataSide.offset+=1
                request.request('api','POST',dataSide).then(res => {//封装的request
                    that.hideShop()
                    let oshopCase = that.data.shopCase
                    let oshopCase2 = oshopCase.concat(res.data)
                    that.setData({
                        shopCase: oshopCase2,
                        rotate: lanimation.export(),
                        touch:false
                    })
                })
            }
        },500)
    },