我需要从递归渲染的组件更新处于 React 状态的深层嵌套对象。这些项目看起来像这样并且可以动态嵌套:
const items = [
{
id: "1",
name: "Item 1",
isChecked: true,
children: []
},
{
id: "3",
name: "Item 3",
isChecked: false,
children: [
{
id: "3.1",
name: "Child 1",
isChecked: false,
children: [
{
id: "3.1.1",
name: "Grandchild 1",
isChecked: true,
children: []
},
{
id: "3.1.2",
name: "Grandchild 2",
isChecked: true,
children: []
}
]
},
{
id: "3.2",
name: "Child 2",
isChecked: false,
children: []
}
]
}
]
我在弄清楚如何从深度嵌套的组件中更新顶级状态时遇到问题,因为它只“了解”自身,而不是整个数据结构。
class App extends React.Component {
state = {
items
};
recursivelyRenderItems(items) {
return (
<ul>
{items.map(item => (
<li key={item.id}>
{item.name}
<input type="checkbox" checked={item.isChecked} onChange={(event) => {
// TODO: Update the item's checked status
}} />
{this.recursivelyRenderItems(item.children)}
</li>
))}
</ul>
)
}
render() {
return (
<div>
{this.recursivelyRenderItems(this.state.items)}
</div>
);
}
}
请问我怎样才能做到这一点?