React Native ImageBackground showing white image only - ios

My ImageBackground module is only showing a white background. The code shown is basically a boilerplate template from React's official documentation on ImageBackgrounds. My uri is not null. "props.route.params.image" is type TakePictureResponse from react-native-camera module.
I look at similar questions to this one, the solutions to theirs were already implemented in mine.
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column',
},
image: {
flex: 1,
resizeMode: 'cover',
justifyContent: 'center',
}
})
render() {
return (
<View style={styles.container}>
<ImageBackground
source={{uri: this.props.route.params.image.uri}}
style={styles.image}
/>
</View>
);
}

You should mention height and width for image Styling and wrap the content inside ImageBackground (just use ImageBackground like a View Component)
image: {
resizeMode: 'cover',
justifyContent: 'center',
width:'100%',
height:'100%'
}
// Example
// App.js
import React from 'react';
import { StyleSheet, Text, View, ImageBackground} from 'react-native';
export default function App() {
const imageUrl = 'https://images.pexels.com/photos/312418/pexels-photo-312418.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500'
return (
<View style={styles.container}>
<ImageBackground
source={{uri: imageUrl}}
style={styles.image}
>
<Text
style={{userSelect:'text',color: '#fff', fontWeight:'bold', fontSize:32, marginTop: 180}}>{'My Text Element'}</Text>
</ImageBackground>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column',
},
image: {
resizeMode: 'cover',
justifyContent:'flex-start',
alignItems:'center',
width:'100%',
height:'100%'
}
})
output

make sure { backgroundColor: undefined } for the View components inside the ImageBackground
if {backgroundColor: '#fff'} then the white layer will cover the background image
<ImageBackground
source={{uri: imageUrl}}
style={styles.image}
>
<View style={{
// (eliminate 'white' layers)
backgroundColor: undefined,
width:'100%', height:'100%', alignItems:'center'}}>
<Text style={{ color: '#fff',fontWeight:'bold',
fontSize:32, marginTop: 180}}> {'My Text Element'}
</Text>
</View>
</ImageBackground>

Related

Give space between <text> components which is a child in a view component

import { Text, View, Image, StyleSheet } from 'react-native';
import * as react from 'react';
export default function TabOneScreen(){
return (
<View style={styles.container}>
<Image source = {{uri:'https://notjustdev-dummy.s3.us-east-2.amazonaws.com/avatars/elon.png'}} style={styles.image} />
my task is to give space to this text which is supposed to appear in a straight line (Elon Musk
11:11AM) using justifyContent: 'space-between' but its not having any effect instead the text are still together (Elon Musk11:11AM)
<View style={styles.row}>
<Text style={styles.name}>Elon Musk</Text>
<Text style={styles.text}>11:11 AM</Text>
</View>
<Text style={styles.text}>Boi Ice for Janet</Text>
</View>
</View>
);
}
const styles = StyleSheet.create({
container:{
flexDirection:'row',
padding:10,
},
image:{
height:60,
width:60,
borderRadius:50,
marginRight:10,
},
name:{
fontSize:20,
color:'blue',
},
row:{
flexDirection:'row',
justifyContent: 'space-between',
},
text:{
fontSize:20,
color:'blue'
}
});
You would need to use a
row:{
flex:1
// other keys
}
and/or
row:{
width:'100%'
}
so that the view (row) covers the width of the screen.

React Native- Touchable not working and no errors?

I am trying to detect touch on a view in React Native. I followed this link and incorporated the Touchable around my styled view like so:
<TouchableWithoutFeedback onPress={cardPressed}>
<View style={styles.card}>
<Text style={styles.card_Head}>What is Something?</Text>
<Text style={styles.card_Body}>Something</Text>
</View>
</TouchableWithoutFeedback>
I am using a functional component, so after export default function App() { I have:
function cardPressed()
{
console.log('pressed');
}
No errors, but I get nothing. What is wrong w this implementation?
Check your import. You should import TouchableWithoutFeedback from react-native and not from react-native-gesture-handler
Check out this code.
import React, { useState } from "react";
import { StyleSheet, TouchableWithoutFeedback, Text, View } from "react-native";
const App = () => {
const [count, setCount] = useState(0);
const cardPressed = () => {
console.log('pressed');
setCount(count + 1);
};
return (
<View style={styles.container}>
<View style={styles.countContainer}>
<Text style={styles.countText}>Count: {count}</Text>
</View>
<TouchableWithoutFeedback onPress={cardPressed}>
<View style={styles.button}>
<Text style={styles.card_Head}>What is Something?</Text>
<Text style={styles.card_Body}>Something</Text>
</View>
</TouchableWithoutFeedback>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: "center",
paddingHorizontal: 10
},
button: {
alignItems: "center",
backgroundColor: "#DDDDDD",
padding: 10
},
countContainer: {
alignItems: "center",
padding: 10
},
countText: {
color: "#FF00FF"
},
card_Head: {
fontWeight: 'bold',
fontSize: 24
},
card_Body: {
fontStyle: 'italic'
}
});
export default App;

Undefined is not an object (evaluating 'CameraManager.Aspect') - react native

I get this error. I am in Windows 10 and using expo sumulator in iphone 6 plus when I try to make run Camera. I try to follow the steps in this tutorial:
1 - npm install react-native-camera --save
2 - In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
3 - Go to node_modules ➜ react-native-camera and add RNCamera.xcodeproj
4 - In XCode, in the project navigator, select your project. Add libRNCamera.a to your project's Build Phases ➜ Link Binary With Libraries
5 - Click RNCamera.xcodeproj in the project navigator and go the Build Settings tab. Make sure 'All' is toggled on (instead of 'Basic'). In the Search Paths section, look for Header Search Paths and make sure it contains both $(SRCROOT)/../../react-native/React and $(SRCROOT)/../../../React - mark both as recursive.
The problem is that I am in Windows and in windows XCODE doesn't exist. How do i fix this in Windows?
Please Give to me Some help. thank you...
My code is:
import React, { Component } from 'react';
import {Text, View,TouchableOpacity,TouchableHighlight} from 'react-native';
import Camera from 'react-native-camera';
const myStyle = {
container: {
flex: 1,
flexDirection: 'row',
},
preview: {
flex: 1,
justifyContent: 'flex-end',
alignItems: 'center'
},
capture: {
flex: 0,
backgroundColor: '#fff',
borderRadius: 5,
color: 'red',
padding: 10,
margin: 40
}
};
export default class CameraAcess extends Component {
constructor(props){
super (props);
this.state = {hasCameraPermission: null, type: Camera.Constants.Type.back,};
}
async componentWillMount() {
const { status } = await Permissions.askAsync(Permissions.CAMERA);
this.setState({ hasCameraPermission: status === 'granted' });
}
render() {
const {container,capture,preview} = myStyle;
const { hasCameraPermission } = this.state;
if (hasCameraPermission === null) {
return <View/>;
} else if (hasCameraPermission === false) {
return <Text>No access to camera</Text>;
} else {
return (
<View style={{ flex: 1 }}>
<Camera style={{ flex: 1 }} type={this.state.type}>
<View style={{flex: 1, backgroundColor: 'transparent', flexDirection: 'row', justifyContent:'space-between'}}>
<TouchableOpacity style={{flex: 0.1, alignSelf: 'flex-end', alignItems: 'center',}}
onPress={() => {this.setState({type: this.state.type === Camera.Constants.Type.back
? Camera.Constants.Type.front : Camera.Constants.Type.back,});}
}>
<Text style={{ fontSize: 18, marginBottom: 10, color: 'white' }}>{' '}Flip{' '}
</Text>
</TouchableOpacity>
<TouchableOpacity onPress={() => {this.props.navigator.push({id: 'MenuPrincipal'});}}
style={{alignSelf: 'flex-end', alignItems: 'center', backgroundColor:'transparent'}}>
<Text style={{ fontSize: 18, marginBottom: 10, color: 'white' ,}}>[Back]</Text>
</TouchableOpacity>
</View>
</Camera>
</View>
);
}
}
}

Content hidden behind TabBarIOS with React Native

I'm building an iOS app with React Native and am implementing a TabBarIOS. The content on the tabs seems to flow behind and be obscured by the bar. In xcode I would have just unchecked the "extend edges" boxes but am not sure how to do this with React Native.
Here's an abbreviated version of what I'm trying to do. The <View> from CreateUser flows behind the tab bar. Is there an easy way to make sure content doesn't get obscured by the tab bar?
import React from 'react'
import {
StyleSheet,
Text,
TextInput,
View,
TouchableHighlight,
} from 'react-native'
export default class TabBar extends React.Component {
state = {
selectedTab: 'list'
}
render() {
return (
<TabBarIOS selectedTab={this.state.selectedTab}
unselectedTintColor="#ffffff"
tintColor="#ffe429"
barTintColor="#294163">
<TabBarIOS.Item
title="My List"
systemIcon="bookmarks"
selected={this.state.selectedTab==='list'}
onPress={() => {
this.setState({
selectedTab: 'list',
});
}}
>
<CreateUser />
</TabBarIOS.Item>
</TabBarIOS>
);
}
}
var styles = StyleSheet.create({
tabContent: {
flex: 1,
alignItems: 'center',
},
tabText: {
color: 'darkslategrey',
margin: 50,
},
});
export default class CreateUser extends React.Component{
render(){
return (
<View style={styles.container}>
<TouchableHighlight style={styles.button}>
<Text style={styles.buttonText}>LOG IN</Text>
</TouchableHighlight>
</View>
)
}
}
var styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: "column",
justifyContent: "flex-end",
alignItems: 'center',
},
button: {
backgroundColor: "#ffe429",
borderRadius: 3,
height: 60,
width: 200,
margin: 7,
//flex: 1,
alignItems: "center",
justifyContent: "center",
},
buttonText: {
color: "#294163",
}
})
This was a problem for me when using a NavigatorIOS component that then rendered it's initialRoute component which contained a TabBarIOS component.
If this is the case for your scenario, you can fix it by using a ScrollView:
Add the flex layout style to your NavigatorIOS:
<NavigatorIOS
initialRoute={{
component: MyView,
title: 'My View',
}}
style={{flex: 1}}
/>
Use a ScrollView:
<TabBarIOS>
<TabBarIOS.Item
systemIcon="history"
title="A Tab">
<ScrollView>
<Text>
Hello World
</Text>
</ScrollView>
</TabBarIOS.Item>
</TabBarIOS>
In my case I needed to add flex: 1 to the style props for the top-level View of the screen.
RN Navigation docs
//MyScreen.tsx
export default () => (
<View style={{ flex: 1 }}>
...
</View>
)

Gif not working in React Native iOS

I'm Using react 15.2.1 and react-native 0.30.0
I checked out How do I display an animated gif in React Native? and followed the instructions.
<Image source={{ uri: 'http://i.giphy.com/l41YiEvBtjGKNlzby.gif'
style={{ height: 250, width: 250 }} />
Also tried
<Image source={require('./path/to.gif')}
style={{ height: 250, width: 250 }} />
But the gif isn't showing. If I switch out the link for an image it works fine.
I checked this working example https://rnplay.org/apps/739mzQ but can't test it with 0.30.0 so I'm wondering if something has changed since then.
Maybe add gif to your project and use require function.
please try this example
import React, {Component} from 'react';
import { StyleSheet, View} from 'react-native';
const SplashGif = require('./images/Wallpaper.gif');
export default class App extends Component {
render() {
const { container, imageStyles } = styles;
return (
<View style={container}>
<Image source={SplashGif} style={imageStyles} />
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
imageStyles: {
resizeMode: 'stretch',
width: '100%',
height: '100%'
}
});
Use this code:
import React, {Component} from 'react';
import { StyleSheet, Image,Text, View} from 'react-native';
const Splash = require('./images/testGif.gif')
class SplashSrceen extends Component {
render() {
const { container, splashgif } = styles;
return (
<View style={container}>
<Image source={Splash} style={splashgif} />
<Text>or</Text>
<Image source={{uri:'https://media.tenor.com/images/0a1652de311806ce55820a7115993853/tenor.gif'}}style={splashgif} />
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
splashgif: {
resizeMode: 'stretch',
width: '100%',
height: '50%'
}
});
export default SplashSrceen ;
Android
To correct for this, we included the following libraries:
dependencies {
implementation 'com.facebook.fresco:fresco:1.10.0'
implementation 'com.facebook.fresco:animated-gif:1.10.0'
}

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