I am new in the react native ecosystem. I am developing a react native app with expo and I see some things weirds.
My simple code is:
export function Practical({ navigation }: any): JSX.Element {
return (
<View>
<View style={styles.primro}>
<View style={styles.ultimo}>
<Text>Hola</Text>
</View>
</View>
</View>
);
}
const yellow = 'yellow';
const purple = 'purple';
const styles = StyleSheet.create({
primro: {
backgroundColor: yellow,
height: '141px',
width: '341px',
},
ultimo: {
backgroundColor: purple,
height: '100px',
width: '200px',
},
});
I am seeing this in web:
I see this in ios:
And this is what I see in chrome with the iphone view, and I would expect to see in the xcode simulator:
Thanks!!
I tried with several structures.
My local images have suddenly stopped displaying in my app.
I tried the solution proposed here: https://stackoverflow.com/questions/35354998/react-native-ios-app-not-showing-static-assets-images-after-deploying
but it didn't work.
I'm importing my image as follows:
import image from '../../assets/images/home-1.jpg';
...
return (
<SafeAreaView style={[styles.container, {margin: 0}]}>
<Image source={image} style={styles.image} />
...
</SafeAreaView>
);
...
const styles = StyleSheet.create({
image: {
backgroundColor: 'red',
width: 300,
height: 300,
},
...
But my image looks like this:
What can be wrong?
I think your used is wrong.
You can try:
<Image source={require('./my-icon.png')} />
More in docs of React-native. Please follow it.
I am trying to make a simple single page react native app.
Just to check if my flexbox layouts are working correctly,I decided to give background colors and check if they are aligned.
As seen in the picture the first view occupies the entire space.
Where I am I going wrong ?
My output as shown
Output
Here is my code:
render() {
return (
<View style={styles.container}>
<View style={styles.questionview}>
<Text>Enter a word to get meaning</Text>
<TextInput onChangeText={(text)=> this.setState({word:text})}/>
<Button title={"GET MEANING"} onPress={this.buttonPressed}/>
</View>
<View styles={styles.ansview}>
<Text styles={styles.anstext}>{this.state.answer}</Text>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex:1
},
questionview:{
flex:6,
backgroundColor:'red',
padding:30
},
ansview:{
flex:3,
backgroundColor:'green'
}
});
Took me some time, but found your problem. It's a typo.
It should be just 'style' , not 'styles'.
It should have been as below :
<View style={styles.ansview}>
<Text style={styles.anstext}>{this.state.answer}</Text>
</View>
also styles.anstext is not present in your code.
I am trying to implement react native webview component in my application, but the web view is not loading any url its just showing the white page.
var React = require('react-native');
var{
View,
Text,
StyleSheet,
WebView
} = React;
module.exports = React.createClass({
render: function(){
return(
<View style={styles.container}>
<WebView source={{uri: 'https://m.facebook.com'}} style= {styles.webView}/>
</View>
);
}
});
var styles = StyleSheet.create({
container: {
flex:1,
backgroundColor: '#ff00ff'
},webView :{
height: 320,
width : 200
}
});
Below is the screenshot of the output .
I had this issue. WebView would render when it was the only component returned, but not when nested in another View component.
For reasons I'm not entirely sure of the issue was resolved by setting a width property on the WebView component.
class App extends React.Component {
render() {
return (
<View style={styles.container}>
<WebView
source={{uri: 'https://www.youtube.com/embed/MhkGQAoc7bc'}}
style={styles.video}
/>
<WebView
source={{uri: 'https://www.youtube.com/embed/PGUMRVowdv8'}}
style={styles.video}
/>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
justifyContent: 'space-between',
},
video: {
marginTop: 20,
maxHeight: 200,
width: 320,
flex: 1
}
});
I'm facing same issue. What I observed is that WebView doesn't work if it's nested. If component returns just WebView, then everything is fine.
Using the answers from other users, I was able to get my react native with webview working both inside a view and outside a view. My problem came down to two things. Being on the android emulator and behind a proxy, I just had to go to my browser (chrome) in the android emulator and sign in to the corporate proxy. Secondly, some sites work and others will not work. Whether the webview was nested or not inside of a View tag, some sites like cnn.com and slack.com etc will work fine, but no matter what settings I tried for google.com it wouldn't work (even though the proxy will definitely allow google.com) Lastly, when I rebuild my application and push to the emulator the new app, sometimes it took an inordinately long time to load any site. But once the site was loaded, the links are quick and responsive. So if you don't at first see something after a build, also be patient. Hope this helps someone else.
My final app.js
import React, { Component } from 'react';
import {
Platform,
StyleSheet,
Text,
View,
Dimensions
} from 'react-native';
import { WebView } from 'react-native';
const deviceHeight = Dimensions.get('window').height;
const deviceWidth = Dimensions.get('window').width;
type Props = {};
export default class App extends Component<Props> {
render() {
return (
<View style={{flex:1}}>
<WebView
style={styles.webview}
source={{uri: 'https://www.slack.com'}}
javaScriptEnabled={true}
domStorageEnabled={true}
startInLoadingState={false}
scalesPageToFit={true} />
</View>
);
}
}
const styles = StyleSheet.create({
webview: {
flex: 1,
backgroundColor: 'yellow',
width: deviceWidth,
height: deviceHeight
}
});
WebView works well on Android. However you need to enable javascript and dom storage for some web pages.
<WebView style={styles.webView}
source={{uri: 'https://google.com/'}}
javaScriptEnabled={true}
domStorageEnabled={true}
startInLoadingState={true}
>
</WebView>
If you want the component to render the entire page, you need to wrap it with View that has flex: 1. The code below works for me:
<View style={{flex:1, alignItems: 'flex-end'}}>
<WebView
source={{uri: this.state.webContentLink}}
startInLoadingState={true}
scalesPageToFit={true} />
</View>
WebView is being moved to react-native-webview
.
None of the other answers worked except this method:
npm install --save react-native-webview
Then use it as follows:
<View style={{ flex: 1, alignItems: 'flex-end' }}>
<WebView
source={{
uri: 'https://www.yahoo.com',
}}
startInLoadingState={true}
scalesPageToFit={true}
style={{
width: 320,
height: 300,
}}
/>
</View>
<View>
<WebView
source={{uri: this.props.link}}
style={styles.webview}
javaScriptEnabled={true}
domStorageEnabled={true}
startInLoadingState={true}
/>
</View>
and style as follows:
const React = require('react-native');
const { Dimensions } = React;
const deviceHeight = Dimensions.get('window').height;
const deviceWidth = Dimensions.get('window').width;
export default {
webview: {
width: deviceWidth,
height: deviceHeight
}
};
All this to deal with bad webview dimension, so just set a specific height and specific width too (deviceHeight and deviceWidth as the example above).
As of June 2020 (noting the date because React Native answers seem to become out-of-date quickly), the simplest solution to this appears to be:
import React from 'react'
import { View, StyleSheet } from 'react-native'
import { WebView } from 'react-native-webview'
export const ComponentWithWebView = () => {
return (
<View style={styles.view}>
<WebView source = {{uri: 'https://www.google.com/'}} />
</View>
)
}
const styles = StyleSheet.create({
view: {
alignSelf: 'stretch',
flex: 1,
}
}
This results in a WebView filling the available space and being nested within a View. I believe the typical problems faced when placing a WebView within a View is that View expects children to force the View to expand (that is, a Text component would take up some amount of width and height which the View then accommodates). WebView, on the other hand, expands to the size of the parent component unless a style is passed specifying the width. Therefore, a simple <View><WebView /></View> results in a 0 width and nothing shown on the screen. The earlier solutions of setting the WebView width work well but require either the device dimensions to be fetched (which might not be the desired width) or for the View to have an onLayout function AND have some way to expand the View to the desired space. I found it easiest to just apply the flex: 1 and alignSelf: 'stretch' for the View to fill the space as desired and then WebView to automatically follow suit.
Hope this helps someone before it becomes obsolete!
I ran into the same issue recently. And I found that
alignment: 'center'
was causing the issue for me. I commented it and the webView got loaded immediately.
I found the solution here :
https://github.com/facebook/react-native/issues/5974
'brunocvcunha's' response worked for me.
Let me give the simplest example which will work seamlessly:
import React from 'react';
import { WebView } from 'react-native';
export default class App extends React.Component {
render() {
return (
<WebView
source={{uri: 'https://github.com/facebook/react-native'}}
/>
);
}
}
Do not add your WebView component within a view that created problem and webview url is not rendered rather styles of view will be shown.
I had the same issue and spent a day attempting to fix it. I copied in the UIExplorer webview example, and that didn't work.
I ultimately ended up upgrading react and creating a new react-native project and copying the files in there, and that fixed it.
I wish I had a better answer as to why that fixed it, but hopefully that helps
Below is piece of the code which worked for me.
render: function(){
return(
<View style={styles.container}>
<WebView url={'https://m.facebook.com'} style= {styles.webView}/>
</View>
);
}
I am doing React Native Webview, Could you please suggest me how to makeWebview loading the uri
render() {
return (
<Modal
animationType="slide"
ref={"webModal"}
style={{
justifyContent: 'center',
borderRadius: Platform.OS === 'ios' ? 30 : 0,
width: screen.width,
height: screen.height,borderColor:'red',
borderWidth: 5
}}
position='center'
backdrop={false}
onClosed={() => {
// alert("Modal closed");
}}>
<View style={{ flexDirection: 'row', justifyContent: 'space-between', paddingHorizontal: 20, top: 10 }} >
<Text style={{ fontSize: 24, fontWeight: '700' }}>
Interests
</Text>
<Icon name="ios-close" size={40} color='purple' onPress={() => { this.refs.webModal.close() }} />
</View>
<WebView
source={{ uri: this.state.link }}
style={{ marginTop: 20,borderColor:'green',
borderWidth: 5 }}
/>
</Modal>
);
}
}
import { WebView } from 'react-native'; is deprecated
use below line instead
npm install react-native-render-html#4.1.2 --save
then
import HTML from 'react-native-render-html';
react-native-render-html starting with version 4.2.0, react-native-webview is now a peer dependency. As a result, you need to install it yourself.
Try
<WebView
source={{ uri: "https://inhall.in/" }}
style={Styles.webView}
javaScriptEnabled={true}
scalesPageToFit />
javaScriptEnabled={true} might help
I have used ScrollView in other apps adding just a style={styles.container} with the styles. However in this app I am creating in my styles I have alignItems:'flex-start' which throws an error with just style={styles.container} and instead you need to pass in alignItems:'flex-start' through contentContainerStyle={styles.container}.
Error: Invariant Violation: ScrollView child layout (["alignItems"]) must by applied through the contentContainerStyle prop.
However when I add contentContainerStyle when scrolling down in the view, once the finger is lifted off the phone (or release of the mouse in simulator), the scroll automatically goes back to the top. If I just use style={styles.container} and take out the alignItems:'flex-start' it scrolls correctly, but my items in the UI are not laid out how I need them. What is causing it to scroll back to the top with contentContainerStyle and is there a fix?
render:
var _that = this;
var iconsToShow = icons.map(function (icon, i){
if(i < 81){
return (
<TouchableHighlight
onPress={() => _that.changeIcon(indexToChange, icon)}
underlayColor='#F7F7F7'
key={i}>
<Text style={styles.iconText}><IonIcons name={icon} size={30} color="#555" /></Text>
</TouchableHighlight>
);
}
});
return (
<Carousel width={SCREEN_WIDTH} animate={false} indicatorColor="#444" inactiveIndicatorColor="#999" indicatorAtBottom={false} indicatorOffset={16}>
<View>
<ScrollView contentContainerStyle={styles.container}>{iconsToShow}</ScrollView>
</View>
<View>
//next page for carousel
</View>
</Carousel>
);
I figured out how to get it to scroll. Instead of having the View wrapping the ScrollView and the ScrollView having any flex styling or alignItems:'flex-start' with contentContainerStyle={styles.container}, put that on the View which is a child of the ScrollView and just use style= instead of contentContainerStyle=.
render:
<ScrollView style={styles.container}>
<Text style={styles.goalName}>{goal}</Text>
<View style={styles.viewContainer}>
{iconsToShow}
</View>
</ScrollView>
Styling:
var styles = StyleSheet.create({
container: {
backgroundColor: 'transparent',
paddingLeft:20,
paddingRight:20
},
viewContainer:{
flexDirection:'row',
flexWrap: 'wrap',
alignItems: 'flex-start',
flex: 1
},
iconText:{
paddingLeft:15,
paddingRight:15,
paddingTop:15,
paddingBottom:15
},
goalName:{
textAlign:'center',
marginTop:40,
marginBottom:10,
fontSize:20
}
});
If someone still couldn't fix the problem, try put {flex: 1} into "all" parents of the ScrollView