动态修改状态state

1. 动态设置状态

<Select onChange={val => this.handleChange(val, 'type')}>
  <Option value="1">approver</Option>
  <Option value="2">acceptor</Option>
 </Select>

// write
handleChange = (val, string) => {
    this.setState({
      [string]: val,   // Equivalent to  type: val, 
    });
 };
 

2. 动态读取状态

// read
  let a = 'approving';
  console.log(this.state[`${a}Tips`]);