I am trying to accomplish this: I would like there to be text on the first image, but after that I do not want there to be. Everything I commented out is how I am doing it originally, but changed so it could be viewed for you guys. Please make note of that as it might change the insight I receive. Right now I am getting no display of text at all.
Also, if the carousel in there adds too much distraction I can take it out.
import * as React from 'react';
import {
Text,
View,
StyleSheet,
Image,
ScrollView,
Dimensions,
ImageBackground,
} from 'react-native';
import Constants from 'expo-constants';
const { width } = Dimensions.get('window');
const height = width * 0.6;
const images = [
'https://images.pexels.com/photos/2249602/pexels-photo-2249602.jpeg?cs=srgb&dl=pexels-sergio-souza-2249602.jpg&fm=jpg',
'https://images.pexels.com/photos/3178881/pexels-photo-3178881.jpeg?cs=srgb&dl=pexels-andrew-neel-3178881.jpg&fm=jpg',
'https://images.pexels.com/photos/4946412/pexels-photo-4946412.jpeg?cs=srgb&dl=pexels-maria-orlova-4946412.jpg&fm=jpg',
'https://images.pexels.com/photos/4911060/pexels-photo-4911060.jpeg?cs=srgb&dl=pexels-cottonbro-4911060.jpg&fm=jpg',
];
//this is the array I noramlly use.
//const images = [
// {id : "1", uri: require('../../assets/placeholder1.jpg'), text: "Test"},
// {id : "2", uri: require('../../assets/placeholder2.jpg'), /*text: "Test"*/},
// {id : "3", uri: require('../../assets/placeholder3.jpg'), /*text: "Test"*/},
// {id : "4", uri: require('../../assets/placeholder4.jpg'), /*text: "Test"*/},
// {id : "5", uri: require('../../assets/placeholder5.jpg'), /*text: "Test"*/},
// {id : "6", uri: require('../../assets/placeholder6.jpg'), /*text: "Test"*/},
// {id : "7", uri: require('../../assets/placeholder7.jpg'), /*text: "Test"*/},
// {id : "8", uri: require('../../assets/placeholder8.jpg'), /*text: "Test"*/},
// {id : "9", uri: require('../../assets/placeholder9.jpg'), /*text: "Test"*/},
//]
export default class App extends React.Component {
state = {
active: 0,
};
change = ({ nativeEvent }) => {
const slide = Math.ceil(
nativeEvent.contentOffset.x / nativeEvent.layoutMeasurement.width
);
if (slide !== this.state.active) {
this.setState({ active: slide });
}
};
render() {
return (
<View style={{flex: 1}}>
<View style={{ flex: 3, justifyContent: 'center', alignItems: 'center'}}>
<ScrollView
pagingEnabled
horizontal
showsHorizontalScrollIndicator={false}
onScroll={this.change}
style={{ width, height }}>
{
images.map((image, index) => (
<ImageBackground
key={index}
source={{uri: image}}
//Normally, I would not have key and source would be like this
//source={item.uri}
style={{ width, height: '100%', resizeMode: 'cover' }}>
<View style={{position: 'absolute', bottom: 25 }}>
<Text style = {this.state.active === 0 ? <Text>Placeholder</Text> : null , styles.Name}> </Text>
<Text style = {this.state.active === 0 ? <Text>Another Placeholder</Text> : null , styles.Name}> </Text>
</View>
</ImageBackground>
))
}
</ScrollView>
<View style={{flexDirection: 'row', position: 'absolute', bottom: 0, alignSelf: 'center',}}>
{
images.map((i, k) => (
<Text style={k == this.state.active ? styles.activeCorousel : styles.carousel}>
⬤
</Text>
))}
</View>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
carousel: {
color: '#888',
fontSize: width / 35,
opacity: .5
},
activeCorousel: {
color: '#fff',
fontSize: width / 35,
},
Name: {
fontWeight: 'bold',
color: 'white',
fontSize: 40,
paddingLeft: 20
},
});
Feel free to copy my code into snack.expo.io.
Use conditional JSX to render only if the index is equal to 0.
images.map((image, index) => (
<ImageBackground
key={index}
source={{uri: image}}
style={{ width, height: '100%', resizeMode: 'cover' }}
>
{index === 0 && (
<View style={{position: 'absolute', bottom: 25 }}>
<Text>Placeholder</Text>
</View>
)}
</ImageBackground>
))
Also, your conditional styling:
<Text style = {this.state.active === 0 ? <Text>...
does not make any sense at all; style
attribute does not support JSX, just only React Native valid styling props.
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