cjd-parkball/src/components/steps/demo/step-next.md

> 中后台业务组件库，中后台就像公园，进入需要买门票（登录），所以以 Parkball(公园球) 命名，公园内必定捕获！作为一个组件库，提供使用方法文档，方便开发者的调用

---
category: 2
title: 步骤切换
title_en: Switch Step
---

 zh-CN

通常配合内容及按钮使用，表示一个流程的处理进度。

 en-US

Cooperate with the content and buttons, to represent the progress of a process.

````jsx
import { Steps, Button, message } from 'parkball';

const Step = Steps.Step;

const steps = [{
  title: 'First',
  content: 'First-content',
}, {
  title: 'Second',
  content: 'Second-content',
}, {
  title: 'Last',
  content: 'Last-content',
}];

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      current: 0,
    };
  }

  next() {
    const current = this.state.current + 1;
    this.setState({ current });
  }

  prev() {
    const current = this.state.current - 1;
    this.setState({ current });
  }

  render() {
    const { current } = this.state;
    return (
      <div>
        <Steps current={current}>
          {steps.map(item => <Step key={item.title} title={item.title} />)}
        </Steps>
        <div className="steps-content">{steps[current].content}</div>
        <div className="steps-action">
          {
            current < steps.length - 1
            && <Button type="primary" onClick={() => this.next()}>Next</Button>
          }
          {
            current === steps.length - 1
            && <Button type="primary" onClick={() => message.success('Processing complete!')}>Done</Button>
          }
          {
            current > 0
            && (
            <Button style={{ marginLeft: 8 }} onClick={() => this.prev()}>
              Previous
            </Button>
            )
          }
        </div>
      </div>
    );
  }
}

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

````css
.steps-content {
  margin-top: 16px;
  border: 2px dashed #e9e9e9;
  border-radius: 6px;
  background-color: #fafafa;
  min-height: 200px;
  text-align: center;
  padding-top: 80px;
}

.steps-action {
  margin-top: 24px;
}
````