import {TextareaItem, InputItem, Button, Flex, SearchBar} from 'antd-mobile';

class leavMessage extends Component {

constructor(props){
    super(props);
    Util.setTitle("关于我们");
    this.state = {
        list:[],
        textareaValue:''
    }
}

//设置textareaValue
handleTextareaChange = (e) => {
    console.log(e);
    this.setState({
        textareaValue:e //不能使用e.target.value 获取值
    })
}

}

<TextareaItem
    placeholder="请输入留言"
    rows={5}
    count={300}
    onChange={this.handleTextareaChange.bind(this)}
/>