setData的使用？

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setData的使用？use of setData?

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？

2473;2091717;65306530; SetsetData of allList: this allList. (setData, orderList: this data.allList}2473;2473;:20917;20788886530630; setData (allList: this data.allList, at a temp), orderList: this data List (*w2002666666666666667388673888886767676766666676767666767676767676767676666667667676767676666767676767676767676767676767676767676766666767676767676767

回答：

let allList = this.data.allList.concat(temp)// 1this.setData({  allList})this.setData({  orderList: allList})// 2 this.setData({  allList,  orderList: allList})

this.setData 是异步