Touchable Opacity breaks centering - react-native

I am trying to style a NavBar for an app with a logo in the center and the back button on the left. I gotten pretty far in centering the logo and button horizontally. However, when I set a align-items:'center' attribute, it seems to break with Touchable Opacity. Is there a way I can center my components vertically and horizontally?
ex. |<- LOGO |
import React,{ Component } from 'react';
import { StyleSheet, View, Image, Text } from 'react-native';
import { colors } from '../../utils/theme';
import { widthScale, heightScale } from '../../utils/responsive';
import {TouchableOpacity}from 'react-native';
const logo = require('../../assets/images/logo.png');
const prev = require('../../assets/images/baseline-arrow_back-24px.png');
class NavBar extends Component{
constructor(props) {
super(props);
}
render(){
return(
<View style ={styles.nav}
<TouchableOpacity style= {styles.prev} onPress={handleClick()}>
<Image source={prev} />
</TouchableOpacity>
<Image style={styles.logo} source={logo} />
<Image source={prev} style={styles.tex} />
</View>
);
}
}
export default NavBar;
const styles = StyleSheet.create({
nav: {
flexDirection: 'row',
justifyContent: 'space-between',
backgroundColor: colors.tertiary,
width: widthScale('100%'),
height: heightScale('2%'),
paddingVertical: heightScale('4%'),
borderBottomWidth: 2,
borderWidth: 1,
flexWrap : 'wrap',
borderColor: 'green',
flex:1
},
logo: {
justifyContent: 'center',
alignItems:'center',
borderWidth: 1,
borderColor: 'blue'
},
info: {
justifyContent: 'center',
},
prev:{
borderRadius: 10,
borderWidth: 1,
borderColor: 'red',
alignItems:'center',
},
tex:{
borderRadius: 10,
borderWidth: 1,
borderColor: 'orange',
justifyContent: 'space-between',
alignItems:'center',
opacity: 0,
}
});
1. Without Touchable Buttons align-items: center, justify-content: center
2. With Touchable Buttons just justify-content: space-between
3. With Touchable Buttons justify-content: space-between and align-items: center

enter code here<SafeAreaView style={styles.maincontent}>
<View style={styles.toolbar}>
<TouchableOpacity style={{ justifyContent: 'center', }} activeOpacity={0.4} onPress={() => Actions.pop()}>
<Image source={{ uri: 'ic_arrow_back_gris_24dp' }} style={styles.back_img} />
</TouchableOpacity>
<Image source={{uri : 'logo'}} style={styles.back_txt}
/>
</View>
</SafeAreaView>
style :
maincontent: {
height: '100%',
width: '100%',
flexDirection: 'column',
backgroundColor: '#f1f1f1',
padding: 10
},
toolbar: {
backgroundColor: '#FFFFFF',
height: 50,
width: '100%',
flexDirection: 'row',
borderRadius: 3,
marginBottom: 10
},
back_img: {
height: 24,
width: 24,
justifyContent: 'center',
alignSelf: 'center',
marginLeft: 10,
padding: 4
},
back_txt: {
color: '#808080',
justifyContent: 'center',
alignSelf: 'center',
marginLeft: '13%',
fontSize: 14,
width: '65%'
},

It seems like the Touchable Opacity was stretching to fill space. By wrapping the Touchable Opacity in a View and limiting the width of that view, the styling worked as intended.
<View style={styles.nav}>
<View style={styles.toolbar}>
<TouchableOpacity style={{ justifyContent: 'nav'}} activeOpacity={0.4} onPress={this.props.prev}>
<Image source={prev} style={styles.back_img} />
</TouchableOpacity>
</View>
<Image source={logo} style={styles.back_txt}
/>
<Image source={prev} style={styles.tex} />
</View>
styles:
const styles = StyleSheet.create({
nav: {
flexDirection: 'row',
justifyContent: 'space-between',
alignItems:'center',
backgroundColor: colors.tertiary,
width: widthScale('100%'),
height: heightScale('2%'),
paddingVertical: heightScale('4%'),
borderBottomWidth: 2,
flexWrap : 'wrap',
},
tex:{
justifyContent: 'center',
alignItems:'center',
opacity: 0,
width: widthScale('10%')
},
toolbar: {
flexDirection: 'row',
alignItems: 'center',
width: widthScale('10%')
},
back_img: {
justifyContent: 'center',
alignSelf: 'center',
aspectRatio:1.5,
},
back_txt: {
justifyContent: 'center',
alignSelf: 'center',
},
});

Related

Slider height is not changing with height property in react-native-swiper

so I'm fairly new to react-native. I'm trying to implement a carousel with react-native-swiper.
Issue -
I want to set the carousel height to 150px, for this I set the property height to 150px, with this the carousel height got changed to 150px but when I try to render a text component below carousel, it is not rendering just below the carousel.
import React from 'react';
import { View, Text, StyleSheet } from "react-native";
import Swiper from 'react-native-swiper';
const styles = StyleSheet.create({
wrapper: { backgroundColor: "black", height: 150 },
slide1: {
height: 150,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#9DD6EB'
},
slide2: {
height: 150,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#97CAE5'
},
slide3: {
height: 150,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#92BBD9'
},
text: {
color: '#fff',
fontSize: 30,
fontWeight: 'bold'
}
})
const HomeScreen_ = () => {
return (
<>
<Swiper
style={styles.wrapper}
height={150}
showsButtons
autoplay
paginationStyle={{ height: 8, position: 'absolute', top: 130 }}
activeDot={
<View
style={{
backgroundColor: '#c3383833', width: 8,
height: 8, borderRadius: 4, marginLeft: 3,
marginRight: 3, marginTop: 3, marginBottom: 3
}} />
}>
<View style={styles.slide1}>
<Text style={styles.text}>Hello Swiper</Text>
</View>
<View style={styles.slide2}>
<Text style={styles.text}>Beautiful</Text>
</View>
<View style={styles.slide3}>
<Text style={styles.text}>And simple</Text>
</View>
</Swiper >
<Text style={{ height: 100, color: "black", }}>Just a Random Text</Text>
</>
)
};
export default HomeScreen_;
you can check this sample, in React Native, we have covered any component using View
import React from 'react';
import {View, Text, StyleSheet, SafeAreaView} from 'react-native';
import Swiper from 'react-native-swiper';
const SwiperExample = () => {
return (
<>
<View style={{flex: 0.3}}> // here
<Swiper
style={styles.wrapper}
showsButtons
autoplay
paginationStyle={{height: 8, position: 'absolute', top: 130}}
activeDot={
<View
style={{
backgroundColor: '#c3383833',
width: 8,
height: 8,
borderRadius: 4,
marginLeft: 3,
marginRight: 3,
marginTop: 3,
marginBottom: 3,
}}
/>
}>
<View style={styles.slide1}>
<Text style={styles.text}>Hello Swiper</Text>
</View>
<View style={styles.slide2}>
<Text style={styles.text}>Beautiful</Text>
</View>
<View style={styles.slide3}>
<Text style={styles.text}>And simple</Text>
</View>
</Swiper>
</View>
<Text style={{height: 100, color: 'black'}}>Just a Random Text</Text>
</>
);
};
const styles = StyleSheet.create({
wrapper: {backgroundColor: 'black', flex: 1},
slide1: {
height: 150,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#9DD6EB',
},
slide2: {
height: 150,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#97CAE5',
},
slide3: {
height: 150,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#92BBD9',
},
text: {
color: '#fff',
fontSize: 30,
fontWeight: 'bold',
},
});
export default SwiperExample;
I solved this issue by removing the height property in the wrapper object of StyleSheet and passing containerStyle={{ height: 150, flex: 0 }} as a prop in Swiper

How can I change styles of an array element in react native

I leave a small code of sample of as I have my code, in fact my code I show it inside a FlatList... but here I leave him something similar in .map that is practically the same thing, they are dynamic Views, I wish that on having clicked in the button, that View change Styles (Position Abosulte, Width, Backgorund color and more)
import { Text, View, StyleSheet, TouchableOpacity } from 'react-native';
import Constants from 'expo-constants';
import AssetExample from './components/AssetExample';
let shopping = ['bread', 'milk', 'cheese', 'hummus', 'noodles'];
export default function App() {
return (
<View style={styles.container}>
{shopping.map((data, idx) => {
return (
<View
style={{
width: '100%',
height: 70,
backgroundColor: '#f7f7f7',
marginTop: 5,
marginBottom: 5,
borderColor: '#dfdfdf',
borderWidth: 1,
alignItems: 'center',
}}>
<Text>Tex: {data}</Text>
//I press this buttom, i want change this View Styles!!!, only this view
<TouchableOpacity onPress={() => {}}>
<View
style={{
width: '100%',
height: 30,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#f7f7f7',
marginTop: 5,
marginBottom: 5,
borderColor: '#dfdfdf',
borderWidth: 1,
borderRadius: 15,
}}>
<Text style={{ width: '100%' }}>Change</Text>
</View>
</TouchableOpacity>
</View>
);
})}
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
paddingTop: Constants.statusBarHeight,
backgroundColor: '#ecf0f1',
padding: 8,
},
});
You can have a state variable and then set it to change the style.
<TouchableOpacity onPress={() => this.setState({changeStyleIndex:index})}>
<View
style={this.state.changeStyleIndex != index{
width: '100%',
height: 30,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#f7f7f7',
marginTop: 5,
marginBottom: 5,
borderColor: '#dfdfdf',
borderWidth: 1,
borderRadius: 15,
}:{change style goes here}}>
<Text style={{ width: '100%' }}>Change</Text>
</View>
</TouchableOpacity>
import React from 'react'
import { Text, View, StyleSheet, TouchableOpacity } from 'react-native';
import Constants from 'expo-constants';
let shopping = ['bread', 'milk', 'cheese', 'hummus', 'noodles'];
export default class App extends React.Component {
constructor(props) {
super(props)
this.state = {
BackColor = '#f7f7f7',
StateWidth: '100%'
}
}
HandleChange = () => {
this.setState({
BackColor: 'red',
StateWidth: '50%'
})
}
render() {
const { BackColor, StateWidth } = this.state
return (
<View style={styles.container}>
{shopping.map((data, idx) => {
return (
<View
style={{
width: { StateWidth },
height: 70,
backgroundColor: { BackColor },
marginTop: 5,
marginBottom: 5,
borderColor: '#dfdfdf',
borderWidth: 1,
alignItems: 'center',
}}>
<Text>Tex: {data}</Text>
//I press this buttom, i want change this View Styles!!!, only this view
<TouchableOpacity onPress={() => { this.HandleChange }}>
<View
style={{
width: '100%',
height: 30,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#f7f7f7',
marginTop: 5,
marginBottom: 5,
borderColor: '#dfdfdf',
borderWidth: 1,
borderRadius: 15,
}}>
<Text style={{ width: '100%' }}>Change</Text>
</View>
</TouchableOpacity>
</View>
);
})}
</View>
)
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
paddingTop: Constants.statusBarHeight,
backgroundColor: '#ecf0f1',
padding: 8,
},
I used the component by class, but change it to function and it will give crt, the logic is basically this.

how set a View background color to red and it should be transparent

I have a Imagebackground for my parentconatiner, I want to set backgroundColor of one of my childView to red and it should be transparent so that the parent container image is visible
it should be like this
sample image
here is my code
import React, { Component } from 'react';
import { View, Text, Image, StyleSheet } from 'react-native';
import colors from '../styles/colors';
import strings from '../localization/strings';
class Appointments extends Component {
render() {
return (
<View style={styles.Container}>
<View style={{ backgroundColor: 'rgba(52, 0, 0, 0.8)', shadowOpacity: 0.2, padding: 5 }}>
<View style={styles.childContainer}>
<Image style={{ justifyContent: 'flex-start', alignItems: 'flex-start' }} source={require('../assets/calender-Icon.png')}
/>
<View style={styles.dateTextContainer}>
<Text style={styles.childText}>Appointment</Text>
<Text style={[styles.childText, { fontSize: 26 }]}>Oct24, 2018</Text>
<Text style={[styles.childText, { fontSize: 16, fontWeight: 'bold' }]}>10:30 am</Text>
</View>
</View>
</View>
<View style={styles.borderText}>
<View style={{ flexDirection: 'row' }}>
<Image source={require('../assets/add-Icon.png')} />
<Text style={[styles.itemName, { fontSize: 16 }]}>New</Text>
</View>
<View style={{ flexDirection: 'row' }}>
<Image source={require('../assets/seeAll-Icon.png')} />
<Text style={[styles.itemName, { fontSize: 16 }]}>See All</Text>
</View>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
Container: {
backgroundColor: colors.white,
borderRadius: 4,
borderWidth: 1,
borderColor: colors.red
},
childContainer: {
justifyContent: 'space-between',
alignItems: 'flex-start',
margin: 15,
flexDirection: 'row',
},
textStyle: {
fontSize: 16,
color: colors.black,
justifyContent: 'flex-end',
alignItems: 'flex-end',
fontWeight: 'bold'
},
childText: {
color: colors.white,
fontSize: 18,
},
dateTimeContainer: {
flexDirection: 'row',
justifyContent: 'space-between',
marginHorizontal: 10,
alignItems: 'flex-end',
},
dateTextContainer: {
flexDirection: 'column',
marginHorizontal: 10,
justifyContent: 'flex-end',
alignItems: 'flex-end',
},
listItem: {
borderWidth: 1,
borderColor: colors.pureBlue,
alignItems: 'center',
justifyContent: 'center',
marginHorizontal: 5,
paddingVertical: 5,
margin: 30
},
itemName: {
fontSize: 14,
color: colors.black,
margin: 2,
paddingLeft: 4
},
border: {
borderRadius: 4,
borderWidth: 1,
borderColor: colors.light_gray,
marginHorizontal: 20
},
imageText: {
flexDirection: 'column',
margin: 10,
flexWrap: 'wrap',
flex: 1
},
borderText: {
flexDirection: 'row',
justifyContent: 'space-between',
margin: 10
}
});
export default Appointments;
I have tried rgba and opacity but still not working
please help me how to do this
You need to remove the backgroundColor of the Container to allow for transparency to go all the way through to the parent container, otherwise the transparency will only allow to see the white background behind
Container: {
// backgroundColor: colors.white,
...
},

React Native Flex Box Align

I am attempting to align an image within and ImageBackground component though no matter what I do, it doesn't appear to follow the flexbox rules.
Below is the desired result
But I am currently getting
Below is the code I have used
render () {
console.log(this.props.data.attributes.main_image_url)
return (
<TouchableOpacity onPress={this._handlePress} style={styles.container}>
<ImageBackground source={{uri: "https:"+this.props.data.attributes.main_image_url}} style={styles.background}>
<View style={styles.logoContainer}>
<Image
// defaultSource={require('../Images/logo-placeholder.png')}
source={{uri: "https:"+this.props.data.attributes.logo_url}}
resizeMode="contain"
style={styles.logo}
/>
</View>
</ImageBackground>
</TouchableOpacity>
)
}
Styles
container: {
marginBottom: Metrics.doubleSection,
flex: 1,
flexDirection: 'column',
justifyContent: 'center',
alignItems: 'stretch',
},
background: {
height: Metrics.screenWidth / 2,
width: Metrics.screenWidth-(Metrics.baseMargin*2),
margin: Metrics.baseMargin
},
logoContainer: {
backgroundColor: Colors.coal,
justifyContent: 'flex-end',
alignItems: 'left',
left: Metrics.doubleBaseMargin,
height: Metrics.images.xl,
width: Metrics.images.xl
},
logo: {
height: Metrics.images.xl,
width: Metrics.images.xl
}
Change your logoContainer style as below set position:'absolute' and set bottom:negative value:
logoContainer: {
backgroundColor: Colors.coal,
justifyContent: 'flex-end',
alignItems: 'flex-start',
position:'absolute', // set position to absolute
bottom:-10, //give relative value here
left: Metrics.doubleBaseMargin,
height: Metrics.images.xl,
width: Metrics.images.xl
},

How to center a TextInput when the keyboard opens in React Native

I have a view with 3 textinput and I am trying to center them when the keyboard is opened. I already tried with KeyboardAvoidingView and the result is that all, except the save button disappear. What am I doing wrong?
import React, { Component } from 'react';
import {
View,
Text,
StyleSheet,
TextInput,
ScrollView,
ListView,
KeyboardAvoidingView,
TouchableOpacity,
AsyncStorage,
} from 'react-native';
import Note from './Note.js';
export default class NoteBody extends Component {
static navigationOptions = {
header: null,
};
constructor(props){
super(props);
this.state = {
noteText: '',
noteTitle: '',
callType: '',
};
}
render() {
return (
<View style={styles.container}>
<View style={styles.header1}>
<Text style={styles.title}>New Note</Text>
</View>
<View style={styles.headerDesign}>
</View>
<View style={styles.header2}>
</View>
<View style= {styles.mainPage}>
<View style={styles.noteBody}>
<TextInput
style = {styles.subject}
placeholder='Raport Number/Note Indentifier'
onChangeText={(noteTitle)=> this.setState({noteTitle})}
value={this.state.noteTitle}
placeholderTextColor='grey'
underlineColorAndroid='transparent'>
</TextInput>
<TextInput
style = {styles.calltype}
multiline = {true}
numberOfLines = {5}
placeholder='Call Type/Other Information'
onChangeText={(callType)=> this.setState({callType})}
value={this.state.callType}
placeholderTextColor='grey'
underlineColorAndroid='transparent'>
</TextInput>
<TextInput
multiline = {true}
numberOfLines = {8}
style={styles.textInput}
placeholder='Notes'
onChangeText={(noteText)=> this.setState({noteText})}
value={this.state.noteText}
placeholderTextColor='grey'
underlineColorAndroid='transparent'>
</TextInput>
</View>
<View style= {styles.footer}>
<TouchableOpacity onPress={ this.addNote.bind(this) } style={styles.addButton}>
<Text style={styles.addButtonText}>SAVE</Text>
</TouchableOpacity>
</View>
</View>
</View>
);
}
addNote(){
const { navigate } = this.props.navigation;
if(this.state.noteText && this.state.noteTitle && this.state.callType){
var d = new Date();
this.props.navigation.state.params.noteArray.push({
'noteName':this.state.noteTitle,
'date':(d.getMonth()+1)+
"/"+d.getDate() +
"/"+ d.getFullYear(),
'callType': this.state.callType,
'note': this.state.noteText
});
this.setState({ noteArray: this.props.navigation.state.params.noteArray });
this.setState({noteText:''});
this.setState({noteTitle:''});
this.setState({callType:''});
AsyncStorage.setItem('arr', JSON.stringify(this.props.navigation.state.params.noteArray));
this.props.navigation.state.params.onNavigateBack();
this.props.navigation.goBack();
}
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
},
mainPage:{
flex: 2,
alignItems: 'center',
justifyContent:'center',
},
header1:{
backgroundColor: '#000',
alignItems: 'center',
height: 40,
justifyContent: 'center',
},
title:{
color: '#fff',
fontSize: 20,
},
header2:{
marginBottom: 10,
backgroundColor: '#000',
alignItems: 'center',
height: 40,
justifyContent: 'center',
},
headerDesign:{
backgroundColor: '#0000FF',
alignItems: 'center',
height: 20,
justifyContent: 'center',
},
noteBody:{
flex: 2,
position: 'absolute',
top: 0,
bottom: 0,
left: 0,
right: 0,
zIndex: 10,
alignItems: 'center',
marginBottom: 100,
},
textInput: {
alignSelf: 'stretch',
textAlignVertical: 'top',
backgroundColor: '#fff',
color: '#000',
padding: 20,
borderTopWidth:1,
borderTopColor: '#D3D3D3',
borderBottomWidth:1,
borderBottomColor: '#000',
},
addButton: {
position: 'absolute',
zIndex: 11,
bottom: 20,
alignItems: 'center',
justifyContent: 'center',
width: 200,
backgroundColor: '#0000FF',
height: 40,
elevation: 8
},
addButtonText: {
color: '#fff',
fontSize: 20,
},
subject:{
alignSelf: 'stretch',
textAlignVertical: 'top',
backgroundColor: '#fff',
padding: 20,
borderTopWidth:1,
borderTopColor: '#000',
borderBottomWidth:1,
borderBottomColor: '#D3D3D3',
},
calltype:{
alignSelf: 'stretch',
textAlignVertical: 'top',
backgroundColor: '#fff',
padding: 20,
},
footer:{
flex: 3,
alignItems: 'center',
justifyContent:'center',
}
});
Please, copy the code in your text editor and give it a try. Just replace the wrapping view with KeyboardAvoidingView like so: https://facebook.github.io/react-native/docs/keyboardavoidingview.html#keyboardverticaloffset and tell me what else can I do?
You must insert the KeyboardAvoidingView in a ScrollView.
Like so:
<ScrollView>
<KeyboardAvoidingView styles={styles.container} behavior = 'padding' enabled>
</KeyboardAvoidingView>
</ScrollView>