解决了, 采用的方法是新增一个 redux state: anotherOrderList (起名的艺术).
它和之前的 reducer 共享一些操作 actions:

```
export function* watchOrderCalcel() {
yield takeLatest(types.SAGA_ORDER_CANCEL, handleCancel)
}
export function* watchOrderReceive() {
yield takeLatest(types.SAGA_ORDER_RECEIVE, handleReceive)
}
export function* watchOrderPay() {
yield takeLatest(types.SAGA_ORDER_PAY, handlePay)
}
export function* watchOrderEvaluation() {
yield takeLatest(types.SAGA_ORDER_EVALUATION, handleEvaluate)
}
```

新增俩给 anotherOrderList 使用的:

```
// ANOTHER ORDER LIST
export function* watchAnotherOrderFetch() {
yield takeLatest(types.SAGA_ANOTHER_ORDER_LIST_FETCH, handleAnotherFetch)
}
export function* watchAnotherOrderRefresh() {
yield takeLatest(types.SAGA_ANOTHER_ORDER_LIST_REFRESH, handleAnotherRefresh)
}
```

在订单详情里要处理下, 取两个 list 的数据:
```
const mapState = (state, ownProps) => {
const { navigation } = ownProps
const orderId = navigation.getParam('orderId')
if (orderId) {
const { orderList, anotherOrderList } = state
const l1 = orderList[orderList.current.value].list
const l2 = anotherOrderList.list
const cond = item => item.orderId === orderId
const data = l1.find(cond) || l2.find(cond)
return {
orderId,
orderStatus: data.orderStatus
}
}
return null
}
```

共享 actions 的方法里要做对新的 list 兼容.