Javascript React:如何使用状态变量从另一个组件运行函数
我有以下免费组件: 我的登录信息:Javascript React:如何使用状态变量从另一个组件运行函数,javascript,reactjs,Javascript,Reactjs,我有以下免费组件: 我的登录信息: import React,{Component}来自“React”; 从“evergreen ui”导入{窗格、文本输入字段、复选框、按钮}; 从“/FormValidator”导入{validateEmail,validatePassword}; 类LoginForm扩展组件{ 建造师(道具){ 超级(道具); 此.state={ 密码错误:{ 状态:false, 值:“” }, 电子邮件错误:{ 状态:false, 值:“” }, 电邮:“, 密码:“”,
import React,{Component}来自“React”;
从“evergreen ui”导入{窗格、文本输入字段、复选框、按钮};
从“/FormValidator”导入{validateEmail,validatePassword};
类LoginForm扩展组件{
建造师(道具){
超级(道具);
此.state={
密码错误:{
状态:false,
值:“”
},
电子邮件错误:{
状态:false,
值:“”
},
电邮:“,
密码:“”,
CheckBoxchecked:false
};
this.handleSubmit=this.handleSubmit.bind(this);
this.handleCheckbox=this.handleCheckbox.bind(this);
}
handleEmailInput=e=>{
const email=e.target.value;
this.setState({email:email});
};
handlePasswordInput=e=>{
const password=e.target.value;
this.setState({password:password});
};
handleCheckbox(){
这是我的国家({
CheckBoxchecked:!this.state.CheckBoxchecked
});
}
handleSubmit(){
if(this.checkFormStatus()){
警报(“表格OK”);
}
}
checkFormStatus(){
//表单验证中间件
const{email,password}=this.state;
const emailErr=validateEmail(电子邮件);
const passwordErr=validatePassword(密码);
if(!emailErr.status&&!passwordErr.status){
返回true;
}否则{
这是我的国家({
埃米尔,
密码错误
});
返回false;
}
}
render(){
返回(
);
}
}
导出默认登录信息;
我的导出登录按钮:
导出类LoginFormButton扩展组件{
render(){
返回(
登录
);
}
}
我的对话
从“react-dom”导入ReactDOM;
从“/LoginForm”导入LoginForm;
从“./LoginFormButton”导入LoginFormButton;
类LoginDialog扩展了组件{
渲染(
返回(
);
)
}
我将函数handleSubmit()
存储在LoginForm组件中。我想从LoginFormButton调用这些函数。此按钮包含在对话框组件中:
我该怎么做?谢谢你的回答和我们的帮助。我是一个初学者,所以我不知道该如何实现 检查下面已更正的代码 LoginForm组件
import React, { Component } from "react";
import { Pane, TextInputField, Checkbox, Button } from "evergreen-ui";
import { validateEmail, validatePassword } from "./FormValidator";
class LoginForm extends Component {
constructor(props) {
super(props);
this.state = {
passwordErr: {
status: false,
value: ""
},
emailErr: {
status: false,
value: ""
},
email: "",
password: "",
CheckBoxchecked: false
};
this.handleSubmit = this.handleSubmit.bind(this);
this.handleCheckbox = this.handleCheckbox.bind(this);
}
handleEmailInput = e => {
const email = e.target.value;
this.setState({ email: email });
};
handlePasswordInput = e => {
const password = e.target.value;
this.setState({ password: password });
};
handleCheckbox() {
this.setState({
CheckBoxchecked: !this.state.CheckBoxchecked
});
}
handleSubmit() {
if (this.checkFormStatus()) {
alert("Form OK");
}
}
checkFormStatus() {
// form validation middleware
const { email, password } = this.state;
const emailErr = validateEmail(email);
const passwordErr = validatePassword(password);
if (!emailErr.status && !passwordErr.status) {
return true;
} else {
this.setState({
emailErr,
passwordErr
});
return false;
}
}
render() {
return (
<Pane padding={15}>
<TextInputField
tabIndex={0}
required
isInvalid={this.state.emailErr.status}
validationMessage={
this.state.emailErr.status ? this.state.emailErr.value : false
}
onChange={this.handleEmailInput}
value={this.state.email}
appearance="neutral"
type="email"
label="Your email-address"
inputHeight={36}
//description="We’ll need your email-address to create an new account"
/>
<TextInputField
required
validationMessage={
this.state.passwordErr.status ? this.state.passwordErr.value : false
}
isInvalid={this.state.passwordErr.status}
onChange={this.handlePasswordInput}
value={this.state.password}
appearance="neutral"
label="Your Password"
type="password"
inputHeight={36}
//description="Create a secure password to protect your account"
/>
<Checkbox
label="Keep me logged in"
checked={this.state.CheckBoxchecked}
onChange={this.handleCheckbox}
/>
<div className="Footer">
<LoginFormButton handleSubmit={this.handleSubmit} />
</div>
</Pane>
);
}
}
export default LoginForm;
export class LoginFormButton extends Component {
constructor(props) {
super(props);
this.state = {
};
}
render() {
return (
<div>
<Button
appearance="primary"
marginLeft={8}
marginRight={16}
intent="success"
onClick={this.props.handleSubmit}
>
Login
</Button>
</div>
);
}
}
import ReactDOM from "react-dom";
import LoginForm from './LoginForm';
import LoginFormButton from './LoginFormButton';
class LoginDialog extends Components {
render(
return(
<Dialog>
<LoginForm/>
</Dialog>
);
)
}
import React,{Component}来自“React”;
从“evergreen ui”导入{窗格、文本输入字段、复选框、按钮};
从“/FormValidator”导入{validateEmail,validatePassword};
类LoginForm扩展组件{
建造师(道具){
超级(道具);
此.state={
密码错误:{
状态:false,
值:“”
},
电子邮件错误:{
状态:false,
值:“”
},
电邮:“,
密码:“”,
CheckBoxchecked:false
};
this.handleSubmit=this.handleSubmit.bind(this);
this.handleCheckbox=this.handleCheckbox.bind(this);
}
handleEmailInput=e=>{
const email=e.target.value;
this.setState({email:email});
};
handlePasswordInput=e=>{
const password=e.target.value;
this.setState({password:password});
};
handleCheckbox(){
这是我的国家({
CheckBoxchecked:!this.state.CheckBoxchecked
});
}
handleSubmit(){
if(this.checkFormStatus()){
警报(“表格OK”);
}
}
checkFormStatus(){
//表单验证中间件
const{email,password}=this.state;
const emailErr=validateEmail(电子邮件);
const passwordErr=validatePassword(密码);
if(!emailErr.status&&!passwordErr.status){
返回true;
}否则{
这是我的国家({
埃米尔,
密码错误
});
返回false;
}
}
render(){
返回(
);
}
}
导出默认登录信息;
LoginFormButton组件
import React, { Component } from "react";
import { Pane, TextInputField, Checkbox, Button } from "evergreen-ui";
import { validateEmail, validatePassword } from "./FormValidator";
class LoginForm extends Component {
constructor(props) {
super(props);
this.state = {
passwordErr: {
status: false,
value: ""
},
emailErr: {
status: false,
value: ""
},
email: "",
password: "",
CheckBoxchecked: false
};
this.handleSubmit = this.handleSubmit.bind(this);
this.handleCheckbox = this.handleCheckbox.bind(this);
}
handleEmailInput = e => {
const email = e.target.value;
this.setState({ email: email });
};
handlePasswordInput = e => {
const password = e.target.value;
this.setState({ password: password });
};
handleCheckbox() {
this.setState({
CheckBoxchecked: !this.state.CheckBoxchecked
});
}
handleSubmit() {
if (this.checkFormStatus()) {
alert("Form OK");
}
}
checkFormStatus() {
// form validation middleware
const { email, password } = this.state;
const emailErr = validateEmail(email);
const passwordErr = validatePassword(password);
if (!emailErr.status && !passwordErr.status) {
return true;
} else {
this.setState({
emailErr,
passwordErr
});
return false;
}
}
render() {
return (
<Pane padding={15}>
<TextInputField
tabIndex={0}
required
isInvalid={this.state.emailErr.status}
validationMessage={
this.state.emailErr.status ? this.state.emailErr.value : false
}
onChange={this.handleEmailInput}
value={this.state.email}
appearance="neutral"
type="email"
label="Your email-address"
inputHeight={36}
//description="We’ll need your email-address to create an new account"
/>
<TextInputField
required
validationMessage={
this.state.passwordErr.status ? this.state.passwordErr.value : false
}
isInvalid={this.state.passwordErr.status}
onChange={this.handlePasswordInput}
value={this.state.password}
appearance="neutral"
label="Your Password"
type="password"
inputHeight={36}
//description="Create a secure password to protect your account"
/>
<Checkbox
label="Keep me logged in"
checked={this.state.CheckBoxchecked}
onChange={this.handleCheckbox}
/>
<div className="Footer">
<LoginFormButton handleSubmit={this.handleSubmit} />
</div>
</Pane>
);
}
}
export default LoginForm;
export class LoginFormButton extends Component {
constructor(props) {
super(props);
this.state = {
};
}
render() {
return (
<div>
<Button
appearance="primary"
marginLeft={8}
marginRight={16}
intent="success"
onClick={this.props.handleSubmit}
>
Login
</Button>
</div>
);
}
}
import ReactDOM from "react-dom";
import LoginForm from './LoginForm';
import LoginFormButton from './LoginFormButton';
class LoginDialog extends Components {
render(
return(
<Dialog>
<LoginForm/>
</Dialog>
);
)
}
导出类LoginFormButton扩展组件{
建造师(道具){
超级(道具);
此.state={
};
}
render(){
返回(
登录
);
}
}
对话框组件
import React, { Component } from "react";
import { Pane, TextInputField, Checkbox, Button } from "evergreen-ui";
import { validateEmail, validatePassword } from "./FormValidator";
class LoginForm extends Component {
constructor(props) {
super(props);
this.state = {
passwordErr: {
status: false,
value: ""
},
emailErr: {
status: false,
value: ""
},
email: "",
password: "",
CheckBoxchecked: false
};
this.handleSubmit = this.handleSubmit.bind(this);
this.handleCheckbox = this.handleCheckbox.bind(this);
}
handleEmailInput = e => {
const email = e.target.value;
this.setState({ email: email });
};
handlePasswordInput = e => {
const password = e.target.value;
this.setState({ password: password });
};
handleCheckbox() {
this.setState({
CheckBoxchecked: !this.state.CheckBoxchecked
});
}
handleSubmit() {
if (this.checkFormStatus()) {
alert("Form OK");
}
}
checkFormStatus() {
// form validation middleware
const { email, password } = this.state;
const emailErr = validateEmail(email);
const passwordErr = validatePassword(password);
if (!emailErr.status && !passwordErr.status) {
return true;
} else {
this.setState({
emailErr,
passwordErr
});
return false;
}
}
render() {
return (
<Pane padding={15}>
<TextInputField
tabIndex={0}
required
isInvalid={this.state.emailErr.status}
validationMessage={
this.state.emailErr.status ? this.state.emailErr.value : false
}
onChange={this.handleEmailInput}
value={this.state.email}
appearance="neutral"
type="email"
label="Your email-address"
inputHeight={36}
//description="We’ll need your email-address to create an new account"
/>
<TextInputField
required
validationMessage={
this.state.passwordErr.status ? this.state.passwordErr.value : false
}
isInvalid={this.state.passwordErr.status}
onChange={this.handlePasswordInput}
value={this.state.password}
appearance="neutral"
label="Your Password"
type="password"
inputHeight={36}
//description="Create a secure password to protect your account"
/>
<Checkbox
label="Keep me logged in"
checked={this.state.CheckBoxchecked}
onChange={this.handleCheckbox}
/>
<div className="Footer">
<LoginFormButton handleSubmit={this.handleSubmit} />
</div>
</Pane>
);
}
}
export default LoginForm;
export class LoginFormButton extends Component {
constructor(props) {
super(props);
this.state = {
};
}
render() {
return (
<div>
<Button
appearance="primary"
marginLeft={8}
marginRight={16}
intent="success"
onClick={this.props.handleSubmit}
>
Login
</Button>
</div>
);
}
}
import ReactDOM from "react-dom";
import LoginForm from './LoginForm';
import LoginFormButton from './LoginFormButton';
class LoginDialog extends Components {
render(
return(
<Dialog>
<LoginForm/>
</Dialog>
);
)
}
从“react-dom”导入ReactDOM;
从“/LoginForm”导入LoginForm;
从“./LoginFormButton”导入LoginFormButton;
类LoginDialog扩展了组件{
渲染(
返回(
);
)
}
看起来,您需要一个LoginForm组件和一个LoginFormButton来处理表单提交
import React,{Component}来自“React”;
从“evergreen ui”导入{窗格、文本输入字段、复选框、按钮};
从“/FormValidator”导入{validateEmail,validatePassword};
const LoginFormButton=({handleSubmit})=>{
返回(
handleSubmit()}//或just->onClick={handleSubmit}
>
登录
);
}
类LoginForm扩展组件{
建造师(道具){
超级(道具);
此.state={
密码错误:{
状态:false,
值:“”
},
电子邮件错误:{
状态:false,
值:“”
},
电邮:“,
密码:“”,
CheckBoxchecked:false
};
this.handleSubmit=this.handleSubmit.bind(this);
this.handleCheckbox=this.handleCheckbox.bind(this);
}
handleEmailInput=e=>{
const email=e.target.value;
this.setState({email:email});
};
handlePasswordInput=e=>{
const password=e.target.value;
this.setState({password:password});
};
handleCheckbox(){
这是我的国家({
CheckBoxchecked:!this.state.CheckBoxchecked
});
}
handleSubmit(){
if(this.checkFormStatus()){
警报(“表格OK”);
}
}
checkFormStatus(){
//表单验证中间件
const{email,password}=this.state;