你好，我是React的新手，想知道如何使用React动态添加输入框。希望有人能帮助我，教我如何绑定onclick事件来动态添加表单中的另一个字段。当我点击“添加”按钮时，应该会渲染出另一个选项输入框。
class AddPost extends Component {
static contextTypes = {
router: React.PropTypes.object
};
appendInput() {
var newInput = `input-${this.state.inputs.length}`;
this.setState({ inputs: this.state.inputs.concat([newInput]) });
}
handleFormSubmit(formProps){
this.props.addPost(formProps);
this.context.router.push('/posts');
}
render(){
const {handleSubmit,fields:{title,option}} = this.props;
return (
<div className="row top-buffer">
<div className="col md-auto">
<form onSubmit={handleSubmit(this.handleFormSubmit.bind(this))}>
<fieldset className="form-group">
<label>Question:</label>
<input {...title} className="form-control" placeholder="Enter question here"/>
{title.touched && title.error && <div className="text-danger">{title.error}</div>}
</fieldset>
<fieldset className="form-group">
<label>Option:</label>
<input {...option} className="form-control" placeholder="Enter option"/>
{option.touched && option.error && <div className="text-danger">{option.error}</div>}
</fieldset>
<fieldset className="form-group">
<label>Option:</label>
<input {...option} className="form-control" placeholder="Enter option"/>
{option.touched && option.error && <div className="text-danger">{option.error}</div>}
</fieldset>
<button className="btn btn-success">Add</button>
</form>
<button onClick={ () => this.appendInput() }>
CLICK ME TO ADD AN INPUT
</button>
</div>
</div>
);
}
}
function validate(formProps){
const errors = {};
if(! formProps.title){
errors.title = "Title is required";
}
if(! formProps.option){
errors.body = "Option is required";
}
return errors;
}
function mapStateToProps(state){
return {
posts:state.post
}
}
export default reduxForm({
form:'post',
fields:['title','body'],
validate:validate,
},mapStateToProps,{addPost})(AddPost);