Image resizing in React Native
JavascriptReactjsReact NativeJavascript Problem Overview
I am trying to resize an image (smaller to fit screen) in my react native app but am unable to do it as it is too big.
Here is the code:
'use strict';
var React = require('react-native');
var {
StyleSheet,
Text,
TextInput,
View,
TouchableHighlight,
ActivityIndicatorIOS,
Image,
Component
} = React;
var styles = StyleSheet.create({
description: {
marginBottom: 20,
fontSize: 18,
textAlign: 'center',
color: '#656565'
},
container: {
padding: 30,
marginTop: 65,
alignItems: 'center'
},
flowRight: {
flexDirection: 'row',
alignItems: 'center',
alignSelf: 'stretch'
},
buttonText: {
fontSize: 18,
color: 'white',
alignSelf: 'center'
},
button: {
height: 36,
flex: 1,
flexDirection: 'row',
backgroundColor: '#48BBEC',
borderColor: '#48BBEC',
borderWidth: 1,
borderRadius: 8,
marginBottom: 10,
alignSelf: 'stretch',
justifyContent: 'center'
},
searchInput: {
height: 36,
padding: 4,
marginRight: 5,
flex: 4,
fontSize: 18,
borderWidth: 1,
borderColor: '#48BBEC',
borderRadius: 8,
color: '#48BBEC'
},
image: {
width: 200,
height: 220
},
});
class SearchPage extends Component {
render() {
return (
<View style={styles.container}>
<Image source={require('image!rclogo')} style={styles.image}/>
<Text style={styles.description}>
Search for RCers!
</Text>
<Text style={styles.description}>
Search
</Text>
<View style={styles.flowRight}>
<TextInput
style={styles.searchInput}
placeholder='Search by Batch, Name, Interest...'/>
<TouchableHighlight style={styles.button}
underlayColor='#99d9f4'>
<Text style={styles.buttonText}>Go</Text>
</TouchableHighlight>
</View>
<TouchableHighlight style={styles.button}
underlayColor='#99d9f4'>
<Text style={styles.buttonText}>Location</Text>
</TouchableHighlight>
</View>
);
}
}
I tried to take it out of the container tag but cannot seem to understand why it will not render properly?
Can this be done with flexbox resizeMode? How do you do it? I can't find any docs on it...
Javascript Solutions
Solution 1 - Javascript
image auto fix the View
image: {
flex: 1,
width: null,
height: null,
resizeMode: 'contain'
}
Solution 2 - Javascript
I adjust your answer a bit (shixukai)
image: {
flex: 1,
width: 50,
height: 50,
resizeMode: 'contain' }
When I set to null, the image wont show at all. I set to certain size like 50
Solution 3 - Javascript
This worked for me:
image: {
flex: 1,
aspectRatio: 1.5,
resizeMode: 'contain',
}
aspectRatio is just width/height (my image is 45px wide x 30px high).
Solution 4 - Javascript
After trying some combinations, I get this working like this:
image: {
width: null,
resizeMode: 'contain',
height: 220
}
Specifically in that order. I hope this can be helpful for someone. (I know that is an old question)
Solution 5 - Javascript
Try this: (for more details click here)
image: { flex: 1, height: undefined, width: undefined, resizeMode: 'contain' }
Solution 6 - Javascript
This worked for me:
image: {
flex: 1,
width: 900,
height: 900,
resizeMode: 'contain'
}
Just need to make sure that the width and height are bigger than you need as it is limited to what you set.
Solution 7 - Javascript
Ran into the same problem and was able to tweak the resize mode until I found something I was happy with. Alternative approaches include:
- Reduce the size of the Static Resource using an image editor
- Add a transparent border to the static resource using an image editor
- Use a Network Resource at the expense of UX
To prevent loss of quality while tweaking images consider working with vector graphics so you can experiment with different sizes easily. Inkscape is free tool and works well for this purpose.
Solution 8 - Javascript
In my case I could not set 'width' and 'height' to null because I'm using TypeScript.
The way I fixed it was by setting them to '100%':
backgroundImage: {
flex: 1,
width: '100%',
height: '100%',
resizeMode: 'cover',
}
Solution 9 - Javascript
This worked for me,
image: {
width: 200,
height:220,
resizeMode: 'cover'
}
You can also set your resizeMode: 'contain'
. I defined the style for my network images as:
<Image
source={{uri:rowData.banner_path}}
style={{
width: 80,
height: 80,
marginRight: 10,
marginBottom: 12,
marginTop: 12}}
/>
If you are using flex, use it in all the components of parent View, else it is redundant with height: 200, width: 220
.
Solution 10 - Javascript
I tried other solutions and I didn't get the result I was looking for. This works for me.
<TouchableOpacity onPress={() => navigation.goBack()} style={{ flex: 1 }}>
<Image style={{ height: undefined, width: undefined, flex: 1 }}
source={{ uri: link }} resizeMode="contain"
/>
</TouchableOpacity>
Note I needed to set this as property of image tag than in css.
resizeMode="contain"
Also note that, you need to set flex: 1 on your parent container. For my component, TouchableOpacity is the root of the component.
Solution 11 - Javascript
Hey to make your image responsive is simple: here is an article i wrote about it. https://medium.com/@ashirazee/react-native-simple-responsive-images-for-all-screen-sizes-with-flex-69f8a96dbc6f
you can simply do this and it will scale
container: {
width: 200,
height: 220
},// container holding your image
image: {
width: '100%',
height: '100%',
resizeMode: cover,
},
});
this is because the container which holds the image determines the height and width, so by using percentages you will be able to make your image responsive to all screens size.
here is another example:
<View style={{
width: 180,
height: 200,
aspectRatio: 1 * 1.4,
}}>
<Image
source={{uri : item.image.url}}
style={{
resizeMode: ‘cover’,
width: ‘100%’,
height: ‘100%’
}}
/>
</View>
Solution 12 - Javascript
To avoid the huge padding when resizing using 'contain'
, use 'stretch'
with a height and an aspectRatio
(that idea is from this answer).
{ height: '20%', aspectRatio: 1, resizeMode: 'stretch' }
Solution 13 - Javascript
Use Resizemode with 'cover' or 'contain' and set the height and with of the Image.
Solution 14 - Javascript
{ flex: 1, resizeMode: 'contain' }
worked for me. I didn't need the aspectRatio
Solution 15 - Javascript
{ flex: 1, height: undefined, width: undefined, resizeMode: 'contain' }
If you are using these attributes in your style prop in the <Image />
and the image is disappeared.
Put your image into a <View>
tag. Like this:
<View
style={{
width: '100%',
height: '30%'
}}
>
<Image
source={require('../logo.png')}
style={{
flex: 1,
height: undefined,
width: undefined,
resizeMode: 'contain'
}}
resizeMode={'cover'}
/>
</View>
Give your view the width and height you want.
Solution 16 - Javascript
**After setting the width and the height of the image then use the resizeMode property by setting it to cover or contain.The following blocks of code translate from normal css to react-native StyleSheet
// In normal css
.image{
width: 100px;
height: 100px;
object-fit: cover;
}
// in react-native StyleSheet
image:{
width: 100;
height: 100;
resizeMode: "cover";
}
OR object-fit contain
// In normal css
.image{
width: 100px;
height: 100px;
object-fit: contain;
}
// in react-native StyleSheet
image:{
width: 100;
height: 100;
resizeMode: "contain";
}
Solution 17 - Javascript
I got the image Size and set it to max 130 width and 30 height.
const [imageSize, setImageSize] = useState();
Image.getSize(url, (width, height) => {
setImageSize(logoSize(width, height));
});
...
<Image style={imageSize ?? initialSize} source={{uri: url}} />
...
const logoSize = (width, height) => {
var maxWidth = 110;
var maxHeight = 30;
if (width >= height) {
var ratio = maxWidth / width;
var h = Math.ceil(ratio * height);
if (h > maxHeight) {
// Too tall, resize
var ratio = maxHeight / height;
var w = Math.ceil(ratio * width);
var ret = {
width: w,
height: maxHeight,
};
} else {
var ret = {
width: maxWidth,
height: h,
};
}
} else {
var ratio = maxHeight / height;
var w = Math.ceil(ratio * width);
if (w > maxWidth) {
var ratio = maxWidth / width;
var h = Math.ceil(ratio * height);
var ret = {
width: maxWidth,
height: h,
};
} else {
var ret = {
width: w,
height: maxHeight,
};
}
}
return ret;
};
Solution 18 - Javascript
Here's my solution if you know the aspect ratio, which you can either get from the image metadata or prior knowledge. This fills the whole width of the screen, but that, of course, can be adjusted.
function imageStyle(aspect)
{
//Include any other style requirements in your returned object.
return {alignSelf: "stretch", aspectRatio: aspect, resizeMode: 'stretch'}
}
This looks a bit nicer than contain
, and takes less finessing with sizes, and it will adjust the height to maintain the proper aspect ratio so your images don't look skewed. Using contain will preserve the aspect ratio but will scale it to fit your other style requirements, which may drastically shrink the image.