Do not update the sub component page of parameter object passed from parent to child of nailing applet?

When developing nailing applet , When I come across such a problem .

The... Passed from the parent to the child Values are arrays , Parent component passed setData to update Value time subcomponent No changes in data were detected

---

The previous usage is as follows ：

The parent component uses the child component :

<Child list='{
     {arrayList}}'/>

The parent component updates the data ：

data:{
    
	arrayList:[]
}

...

const newList = [1, 2, 3, 4, 5, 6]
this.setData({
    
	arrayList: newList
})

The child component receives the parent component data and stores it in itself data In order to use

The subcomponent receives parameters ：

data:{
    
	list: []
}

...

this.setData({
    
	list: this.props.list
})

Use of subcomponents :

	<view a:for="{
     {list}}">
		{
   {item}}
	</view>

---

After trying , It is modified to use the parent component directly props The data in

Modify the usage as follows ：
The subcomponent receives parameters ：

props: {
    
	list: ()=>Object;
}

Use of subcomponents :

	<view a:for="{
     {list}}">
		{
   {item}}
	</view>