有多个按钮时点击单个按钮显示加载中

const {  Button  } = antd;
const {  PoweroffOutlined  } = icons;

class App extends React.Component {
  state = {
    loadings: [],
  };

  enterLoading = index => {
    this.setState(({ loadings }) => {
      const newLoadings = [...loadings];
      newLoadings[index] = true;

      return {
        loadings: newLoadings,
      };
    });
    setTimeout(() => {
      this.setState(({ loadings }) => {
        const newLoadings = [...loadings];
        newLoadings[index] = false;

        return {
          loadings: newLoadings,
        };
      });
    }, 6000);
  };

  render() {
    const { loadings } = this.state;
    return (
      <>
        <Button type="primary" loading={loadings[0]} onClick={() => this.enterLoading(0)}>
          Click me!
        </Button>
        <Button
          type="primary"
          icon={<PoweroffOutlined />}
          loading={loadings[1]}
          onClick={() => this.enterLoading(1)}
        >
          Click me!
        </Button>
        <Button
          type="primary"
          icon={<PoweroffOutlined />}
          loading={loadings[2]}
          onClick={() => this.enterLoading(2)}
        />
      </>
    );
  }
}

ReactDOM.render(<App />, mountNode);