情况一：
this.setData({
allList: this.data.allList.concat(temp),
})
this.setData({
orderList: this.data.allList
})
情况二：
this.setData({
allList: this.data.allList.concat(temp),
orderList: this.data.allList
})
w为啥情况一的orderList有数据，情况二的orderList无数据？
let allList = this.data.allList.concat(temp) // 1 this.setData({ allList }) this.setData({ orderList: allList }) // 2 this.setData({ allList, orderList: allList })this.setData 是异步因为allList的值还没写入成功呀
let allList = this.data.allList.concat(temp)this.setData({allList,orderList: allList})