React native 如何在点击按钮后更改按钮上的图标(图标名称属性)
我有一个按钮组件,上面有文字和图标。 本机基本库中的按钮和图标。。。 单击按钮后如何更改图标(图标名称属性)React native 如何在点击按钮后更改按钮上的图标(图标名称属性),react-native,native-base,React Native,Native Base,我有一个按钮组件,上面有文字和图标。 本机基本库中的按钮和图标。。。 单击按钮后如何更改图标(图标名称属性) const defaultImage = require('../images/defaultImage.png'); const changedImage = require('../images/changedImage.png'); class ChangeImage extends Component {
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
代码片段:
<Button
onPress={}
transparent
iconRight
small
>
<Text style={{ color: 'red', fontSize: 18 }}>HIDE</Text>
<Icon
name='ios-arrow-down-outline'
style={{ color: 'red', fontSize: 18 }}
/>
</Button>
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
隐藏
您可以尝试以下方法:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
const defaultImage=require('../images/defaultImage.png');
const changedImage=require('../images/changedImage.png');
类ChangeImage扩展组件{
构造函数(){
超级();
this.state={showDefaultImage:true};
}
renderImage()={
const imgSrc=this.state.showDefaultImage?defaultImage:changedImage;
返回(
);
}
render(){
返回(
这是我的国家(
{showDefaultImage:!this.state.showDefaultImage}
)}
/>
{this.renderImage()}
);
}
}
希望这会有所帮助。您可以尝试以下方法:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
const defaultImage=require('../images/defaultImage.png');
const changedImage=require('../images/changedImage.png');
类ChangeImage扩展组件{
构造函数(){
超级();
this.state={showDefaultImage:true};
}
renderImage()={
const imgSrc=this.state.showDefaultImage?defaultImage:changedImage;
返回(
);
}
render(){
返回(
这是我的国家(
{showDefaultImage:!this.state.showDefaultImage}
)}
/>
{this.renderImage()}
);
}
}
希望这会有所帮助。您可以通过在按下按钮后更改状态来实现这一点:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
工作演示:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
示例代码:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
import React, { Component } from 'react';
import { Container, Header, Content, Button, Text, Icon } from 'native-base';
export default class ButtonThemeExample extends Component {
constructor() {
super();
this.state = { iconName: "md-arrow-back" };
}
render() {
return (
<Container>
<Header />
<Content>
<Button
onPress={ () => this.setState(
{ iconName: "md-arrow-down" }
)}
transparent
iconRight
small
>
<Text style={{ color: 'red', fontSize: 18 }}>HIDE</Text>
<Icon
name= {this.state.iconName}
style={{ color: 'red', fontSize: 18 }}
/>
</Button>
</Content>
</Container>
);
}
}
import React,{Component}来自'React';
从“本机基础”导入{容器、标题、内容、按钮、文本、图标};
导出默认类按钮示例扩展组件{
构造函数(){
超级();
this.state={iconName:“md arrow back”};
}
render(){
返回(
这是我的国家(
{iconName:“md向下箭头”}
)}
透明的
肖像权
小的
>
隐藏
);
}
}
希望这能奏效 您可以通过在按下按钮后更改状态来实现:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
工作演示:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
示例代码:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
import React, { Component } from 'react';
import { Container, Header, Content, Button, Text, Icon } from 'native-base';
export default class ButtonThemeExample extends Component {
constructor() {
super();
this.state = { iconName: "md-arrow-back" };
}
render() {
return (
<Container>
<Header />
<Content>
<Button
onPress={ () => this.setState(
{ iconName: "md-arrow-down" }
)}
transparent
iconRight
small
>
<Text style={{ color: 'red', fontSize: 18 }}>HIDE</Text>
<Icon
name= {this.state.iconName}
style={{ color: 'red', fontSize: 18 }}
/>
</Button>
</Content>
</Container>
);
}
}
import React,{Component}来自'React';
从“本机基础”导入{容器、标题、内容、按钮、文本、图标};
导出默认类按钮示例扩展组件{
构造函数(){
超级();
this.state={iconName:“md arrow back”};
}
render(){
返回(
这是我的国家(
{iconName:“md向下箭头”}
)}
透明的
肖像权
小的
>
隐藏
);
}
}
希望这能奏效 我也有同样的问题,这就是我如何使用state和conditional语句来解决它的:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
函数列表项({title,description,status,onPress,onCheck}){
//声明一个新的状态变量,我们称之为“count”
//声明一个新的状态变量,我们称之为“count”
const[iconName,setIconName]=useState(“复选框空白圈”);
报税表(
{title}
{说明}
{
如果(iconName==“复选框空白圈”){
setIconName(“复选框标记圆”)
}
如果(iconName==“复选框标记圆”){
setIconName(“复选框空白圈”)
}
}
}>
);
}
我也遇到了同样的问题,这就是我在Press上使用state和conditional语句解决问题的方法:
const defaultImage = require('../images/defaultImage.png');
const changedImage = require('../images/changedImage.png');
class ChangeImage extends Component {
constructor() {
super();
this.state = { showDefaultImage: true };
}
renderImage() = {
const imgSrc = this.state.showDefaultImage? defaultImage : changedImage;
return (
<Image
source={ imgSrc }
/>
);
}
render(){
return (
<View>
<TouchableOpacity
onPress={ () => this.setState(
{ showDefaultImage: !this.state.showDefaultImage }
)}
/>
{this.renderImage()}
</TouchableOpacity>
</View>
);
}
}
函数列表项({title,description,status,onPress,onCheck}){
//声明一个新的状态变量,我们称之为“count”
//声明一个新的状态变量,我们称之为“count”
const[iconName,setIconName]=useState(“复选框空白圈”);
报税表(
{title}
{说明}
{
如果(iconName==“复选框空白圈”){
setIconName(“复选框标记圆”)
}
如果(iconName==“复选框标记圆”){
setIconName(“复选框空白圈”)
}
}
}>
);
}
请添加您尝试过的代码。在此处共享您的代码请添加您尝试过的代码。在此处共享您的代码他问它wrt NativeBase,而您的答案似乎不包括用例答案是在他将他尝试过的代码放入问题之前,所以他试图编写一些通用代码。他问它wrt NativeBase,你的答案似乎不包括用例,答案是在他将代码放入问题之前,他已经尝试过了,所以他试图编写一些通用代码。