我有一个组件,它的子组件与组件本身的类型相同。我也可以渲染孩子,但孩子们似乎无法访问他们的状态。我在 Redux 中使用 React
export class Material extends React.Component {
constructor(props) {
super(props)
this.renderChild = this.renderChild.bind(this)
this.getNestedItems = this.getNestedItems.bind(this)
}
static propTypes = {
parentId: PropTypes.number,
id: PropTypes.number.isRequired,
name: PropTypes.string.isRequired,
subtext: PropTypes.string.isRequired,
childIds: PropTypes.arrayOf(PropTypes.number.isRequired),
fileType: PropTypes.string.isRequired
}
// This is where I am having trouble.
// Shouldn't the props be accessible from state itself?
renderChild = (id, childId) => (
<Material key={childId}
id={childId}
parentId={id}
name={name}
subtext={subtext}
fileType={fileType}
/>
)
getNestedItems = (id, childIds) => {
console.log("id: " + id)
console.log("childIds: " + childIds)
var childItems = []
for(var i=0; i < childIds.length; i++){
var child = this.renderChild(id, childIds[i])
childItems.push(child)
}
return childItems
}
render(){
let childItems = []
if(this.props.childIds){
childItems = this.getNestedItems(this.props.id, this.props.childIds)
}
return(
<ListItem
leftAvatar={<Avatar icon={fileType.length === 0 ? <FileFolder /> : <ActionAssignment />} />}
rightIcon={fileType.length === 0 ? <AddCircle /> : <ActionInfo />}
primaryText={name}
secondaryText={subtext}
initiallyOpen={fileType.length === 0} // fileType is empty if it is a folder
primaryTogglesNestedList={fileType.length === 0}
nestedItems={childItems} // one has to pass an array of elements
/>
)
}
}
const mapStateToProps = (state, ownProps) => {
return {
id: ownProps.id,
name: state.Material[ownProps.id].name,
subtext: state.Material[ownProps.id].subtext,
childIds: state.Material[ownProps.id].childIds,
fileType: state.Material[ownProps.id].fileType,
}
}
export default connect(
mapStateToProps
)(Material)
此外,我正在使用Material-ui 中的ListItem(这些最终呈现在 List 组件中)并且我的代码受到官方 redux 存储库中树视图示例的严重影响。我的状态是这样的:
const initialState = {
0: {
id: 0,
name: 'Root',
subtext: 'Some subtext',
fileType: '',
childIds: [1]
},
1: {
id: 1,
name: 'Child',
subtext: 'Child subtext',
fileType: 'png',
childIds: []
}
}
显示的状态与树视图示例具有相同的结构