Ggtcf

I'm trying to create a menu for my application in React-Native which should have multiple icons in the below way

The icons should be in the same row and wrapped so that if screen is bigger more icons will be on the same row.

My current code is as follows

import React from 'react';
import StyleSheet, View from 'react-native';

export default class App extends React.Component 
 render() 
 return (
 <View style=styles.container>
 <View style=styles.box></View>
 <View style=styles.box></View>
 <View style=styles.box></View>
 <View style=styles.box></View>
 <View style=styles.box></View>
 </View>
 );
 


const styles = StyleSheet.create(
 container: 
 flex: 1,
 backgroundColor: '#fff',
 alignItems: 'center',
 justifyContent: 'space-evenly',
 flexDirection: 'row',
 flexWrap: 'wrap',
 paddingTop: 40
 ,
 box: 
 width: 100,
 height: 100,
 backgroundColor: 'aqua',
 margin: 10,
 
);

The current output is as below

The children count may change in the future but i need to have spacing on the sides, using flex-start will give the below output which is wrong.i want to have spacing in both sides as well.

How do i align it to left and have the items with even space around as the image above ?

for Box use Dimensions, Based on screen width divide box width

const styles = StyleSheet.create(
 container: 
 flex: 1,
 backgroundColor: '#fff',
 alignItems: 'center',
 justifyContent: 'flex-start',
 flexDirection: 'row',
 flexWrap: 'wrap',
 paddingTop: 40
 ,
 box: 
 width: (Dimensions.get('window').width / 3) - 20, /* minus some value for adjust the gap between boxes */
 height: 100,
 backgroundColor: 'aqua',
 margin: 10,
 
);

One option is to add extra 'fake' boxes which will fill the available space in last row:

<View style=styles.box></View>
<View style=styles.box></View>
<View style=styles.box></View>
<View style=styles.box></View>
<View style=styles.box></View>
<View style=[styles.box, styles.boxFake]></View>
<View style=[styles.box, styles.boxFake]></View>
<View style=[styles.box, styles.boxFake]></View>
<View style=[styles.box, styles.boxFake]></View>
<View style=[styles.box, styles.boxFake]></View>

// reset all styles like backgroundColor, border, etc.
const styles = StyleSheet.create(
 boxFake: 
 backgroundColor: 'transparent'
 
);

You can easy calculate the number of necessary 'fake' boxes by the formula:

fakeBoxes = boxesPerRow - totalBoxes % boxesPerRow

I took a different approach by using another view as a wrapper and doing the calculation of its width, this is easier to decide the column widths.
The only problem is that we should know the width of the item, wont be a problem in my case.
The code will be as below.

import React from 'react';
import StyleSheet, View, ScrollView from 'react-native';

export default class App extends React.Component 

 constructor(props) 
 super(props);
 this.state = 
 width: 110
 ;
 

 render() 
 //width of child is 110
 const width = `$100 / parseInt(this.state.width / 110)%`;
 return (
 <ScrollView>
 <View style=styles.container onLayout=this.onLayout.bind(this)>
 <View style=[styles.wrapper, width: width ]>
 <View style=styles.box></View>
 </View>
 <View style=[styles.wrapper, width: width ]>
 <View style=styles.box></View>
 </View>
 <View style=[styles.wrapper, width: width ]>
 <View style=styles.box></View>
 </View>
 <View style=[styles.wrapper, width: width ]>
 <View style=styles.box></View>
 </View>
 <View style=[styles.wrapper, width: width ]>
 <View style=styles.box></View>
 </View>
 </View>
 </ScrollView>
 );
 

 onLayout(e) 
 if (this.state.width !== e.nativeEvent.layout.width) 
 this.setState(
 width: e.nativeEvent.layout.width
 )
 
 


const styles = StyleSheet.create(
 container: 
 flex: 1,
 backgroundColor: '#fff',
 alignItems: 'flex-start',
 justifyContent: 'flex-start',
 flexDirection: 'row',
 flexWrap: 'wrap',
 paddingTop: 40
 ,
 box: 
 width: 100,
 height: 100,
 backgroundColor: 'green',
 ,
 wrapper: 
 marginVertical: 10, alignItems: 'center'
 
);