我有一个TextInput的简单代码，我希望它在第一次渲染和提交时得到关注.然而，它根本没有得到关注.
render() {
return (
<TextInput
ref={(c) => this._input = c}
style={[styles.item, this.props.style]}
placeholder={"New Skill"}
onChangeText={(text) => {
this.setState({text})
}}
onSubmitEditing={(event) => {
this.props.onSubmitEditing(this.state.text);
this._input.clear();
this._input.focus();
}}
/>
);
}
componentDidMount() {
this._input.focus();
}