我有一个呈现另一个组件的组件。当我对子组件进行更改时,我希望主组件重新呈现。
在下面的示例中,第二个组件的onSubmit
在主组件上触发_onSubmit
,但是setState
不会重新渲染 View
有想法吗?
class MainLayout extends Component {
constructor(props) {
super(props);
this.state = {
data: 'no',
};
this._onSubmit = this._onSubmit.bind(this);
}
// this get's triggered by _checkSubmitReady() on the second component
_onSubmit(data) {
// this state get's set, but this component is not re-rendered
// i assume render() should be called here
this.setState({data: data});
}
render() {
return (
<View><SecondLayout onSubmit={this._onSubmit}/>{this.state.data}</View>
);
}
}
class SecondLayout extends Component {
constructor(props) {
super(props);
this._checkSubmit = this._checkSubmit.bind(this);
}
_checkSubmit() {
this.props.onSubmit('yes');
}
// sub component is mounted, call onSubmit() on parent component
componentDidMount() {
this._checkSubmit();
}
render() {
return (
<View><Text>Nothing here</Text></View>
);
}
}
最佳答案
尝试:
_onSubmit(data) {
this.setState({ data: data }, () => {
this.forceUpdate();
});
}
或者,如果您使用的是ES5:
_onSubmit(data) {
this.setState({ data: data }, function () {
this.forceUpdate();
}.bind(this));
}