• 父组件

render(){
    <Tablebox callback={this.changeIndex.bind(this)}/>
}
changeIndex(index){
    console.log(index)
}

• 子组件 Tablebox

    render(){
        let {callback}=this.props;
        return <div className='tablebox'
            onMouseEnter={()=>{
                callback('凌晨两点半')
            }}>
                    
                </div>
    }