可以onChange = {this.nameHandler}调用nameHandler

Question

以下是有效的代码段，状态-state = {        name : '',        age : ''    }onChangeHandler-nameHandler = (event) =>{        this.setState({name: event.target.value});    }UI-<input type = "text" onChange = {this.nameHandler} value = {this.state.name}/>  但是，为什么下面的方法不起作用？状态-state = {        name : '',        age : ''    }onChangeHandler-nameHandler = (event) =>{        this.setState({name: event.target.value});    }UI-<input type = "text" onChange = {(event) =>this.nameHandler} value = {this.state.name}/>  甚至没有以下内容，state = {        name : '',        age : ''    }onChangeHandler-nameHandler(event){        this.setState({name: event.target.value})    }UI-<input type = "text" onChange = {(event) =>this.nameHandler} value = {this.state.name}/>  我了解我的问题的原因是缺乏箭头功能理论的知识。请分享详细原因