1.清空input输入框

class CustomTextInput extends React.Component {
  constructor(props) {
    super(props);
    this.textInput = React.createRef();
  }

  clear() {
    this.textInput.current.state.value = '';
  }

  render() {
    return (
       <Search size="large" defaultValue="" style={{ width: 400 }} ref={this.textInput} />
       <Button onClick={() => {this.clear()}}>清空<Button>
    );
  }
}

2.react中select重新设置defaultValue

给select添加一个key，赋予不同值

select：

                    <Select
						key={this.state.selectValue}
						onChange={this.handleChange}
						defaultValue='All Products'
						style={{ width: 120 }}
					>
						<Option value='0'>All Products</Option>
						<Option value='2'>Has Reviews</Option>
						<Option value='1'>No Reviews</Option>
						<Option value='3'>New Reviews</Option>
					</Select>

js：

this.state = {
	selectValue:0
};

this.setState({
	selectValue:Math.random()*10
})