I have recently been experimenting with react-native for UWP and I want to ask if there is any shadow support for UWP yet.
Right now, I have this code for the container
const styles = {
viewStyle: {
backgroundColor: '#F8F8F8',
height: 60,
paddingTop: 12,
justifyContent: 'center',
alignItems: 'center',
shadowColor: '#000',
shadowOffset: { width: 0, height: 2 },
shadowOpacity: 0.2,
elevation: 4,
position: 'relative'
}
};
but no shadow appears at the bottom like it does for android.
I want to ask if there is any shadow support for UWP yet
No, no work has been started for UWP on this yet. In the issue 953 #leonskim mentioned that :
Shadow props(shadowOffset for an example) work on iOS, and Android has elevation to draw shadow under a view component. Any updates on adding shadow to the view component for Windows? It would be very helpful.
This issue addresses the WPF side implemented the shadow with pull request 998, but since UWP will have the different way that still not implemented.
You could open a new issue here to request the UWP side shadow feature.
Related
I'm making a game in React Native. Part of the game includes a grid of buttons in a dimond shape similar to this:
To make it more complex, the assets are in SVG format. Although I am able to make a button using an SVG, what I'm a bit stumped on is laying out the buttons in this dimond shape, with an SVG layer behind it, and keeping that shape, with the buttons overlayed intact with different screen sizes.
Does anyone have experiece with this?
You can try with transform like
<TouchableOpacity
style={{
height: 30,
width: 30,
marginVertical: 10,
borderColor: 'black',
borderWidth: 2,
transform: [{ rotate: '45deg' }],
}}
/>
Stack:
React Native
React Navigator
Core components only
I have this style on TabNavigator.tsx:
const styles = StyleSheet.create({
tabStyle: {
backgroundColor: colors.background,
borderTopLeftRadius: 40,
borderTopRightRadius: 40,
height: 80,
overflow: 'hidden',
// position: 'absolute', // needed to ensure the bar has a transparent background in the corners
},
})
I keep commented the position absolute, there is always a background behind the corners, making it looking weird when a component of another color scroll.
Here it is, colored in yellow for visibility:
If I un-comment position absolute, the content flow behind the tab bar, making it feel more natural.
But...
I need to add a bottom margin on each screen to compensate the space that the tab takes, or the content in the bottom is hidden.
There i feel that there should be a good practice or a known pattern, maybe a tested workaround, that would make my life easier. Do you have an idea?
Thanks
Ahh, it's simple, after going through trial and error I discovered that just add Border Radius to it and make sure barStyle has overflow hidden. Here I pasted the snippet for it.
barStyle:{
borderRadius:50,
backgroundColor:"orange",
position: 'absolute',
overflow:'hidden',
left: 0,
bottom: 0,
right: 0,
padding:5,
}
Thnx me later...
tabBarOptions={{
style: {
backgroundColor: 'green',
borderTopLeftRadius: 30,
borderTopRightRadius: 30,
overflow: "hidden",
},
}}
I need to add a shadow around the Image my image is a rectangular field and i need to add a shadow around that rectangular field
I want to do something like this: stackoverflow question
I wanted to know how to do this in react native that can be applicable for both android and ios
Shadow is only for iOS. For Android you need Elevation. You could do something like this. I use it currently and works fine:
elevationLow: {
...Platform.select({
ios: {
shadowColor: '#000',
shadowOffset: { width: 0, height: 2 },
shadowOpacity: 0.8,
shadowRadius: 2,
},
android: {
elevation: 5,
},
}),
},
Wrap your Image inside View (for semantic clarity) and then define following style rules to the View:
shadow: {
shadowColor: '#202020',
shadowOffset: {width: 0, height: 0},
shadowRadius: 5,
},
I made an example here: https://snack.expo.io/rJesdOgRZ. But atm "snack" is so freaking slow that it's difficult to check actual results. But at least the code is visible and works as a benchmark.
You can use shadow style props for your View to achieve this. You will want
shadowOffset = takes in height and (optional, i dont really like using it, but ) width values to move your shadow in those directions.
shadowColor = takes a colour, similar to backgroundColor, indicates colour of the shadow
shadowRadius = takes a value, will dictate how far out your shadow is from the View
shadowOpacity = value from 0 to 1, indicates how strong the shadow presence is.
Heres a quick example of something you probably want. This code will make a red circle, with a slight shadow visible at the bottom of the circle. This code is of course customizable.
<View style = {{
position: 'absolute', top: 50, left: 50,
backgroundColor: 'red', width: 100, height: 100, borderRadius: 50,
shadowColor: "black",
shadowOffset: { height: 2},
shadowOpacity: 0.3,
}}>
//CONTENT
</View>
Another easiest and the best option I came across is the use of react-native-shadow-2 along with react-native-svg. Here, we need to install react-native-svg since react-native-shadow-2 is dependant on react-native-svg.
Basic shadow
import { Shadow } from 'react-native-shadow-2';
export default const ImageWithShadow = () => {
<Shadow>
<Image style={styles.imageStyles} source={ImageSource} />
</Shadow>
}
Advance shadow styling
import { Shadow } from 'react-native-shadow-2';
export default const ImageWithShadow = () => {
<Shadow startColor='#00000020' distance=10 radius=5 size=20>
<Image style={styles.imageStyles} source={ImageSource} />
</Shadow>
}
As shown in the above sample code you have to just wrap all the content (image or text or View or any other react native component) that you need to add a shadow inside the tag. No need of doing any manual styling like in react native shadow options. If you browse their documentation you can find many props that you can effectively utilize to customize the shadow applied to the component.
I am trying to create a UI in react native, the UI contains a box with outer shadow. using the image I have done that, but is there any proper way to do that?
You will have to use different style props for iOS and Android.
Android
It's very simple for android, just use the elevation style prop (See docs) . An example:
boxWithShadow: {
elevation: 5
}
iOS
In iOS you have more flexibility, use the Shadow props (See docs). An example:
boxWithShadow: {
shadowColor: '#000',
shadowOffset: { width: 0, height: 1 },
shadowOpacity: 0.8,
shadowRadius: 1,
}
Summary
In summary, to get box shadow for both platforms, use both sets of style props:
boxWithShadow: {
shadowColor: '#000',
shadowOffset: { width: 0, height: 1 },
shadowOpacity: 0.8,
shadowRadius: 2,
elevation: 5
}
Attention: Do not use overflow: 'hidden';, in iOS all of the shadows disappear by this property.
Hey, Look it's Done Now !
const styles = StyleSheet.create({
shadow: {
borderColor:'yourchoice', // if you need
borderWidth:1,
overflow: 'hidden',
shadowColor: 'yourchoice',
shadowRadius: 10,
shadowOpacity: 1,
}
});
Keep in mind the shadow's props are only available for IOS.
You can use library "react-native-shadow-2", works for both android and iOS.
No need to write seperate chunk of code for iOS/android & has typescript support also.
Installation:
First install react-native-svg.
Then install react-native-shadow-2:
npm i react-native-shadow-2
Structure:
import { Shadow } from 'react-native-shadow-2';
<Shadow>
{/* Your component */}
</Shadow>
There are many props such as startColor, finalColor, radius, offset. You can use as per your requirements.
I've found a workaround using a Linear Gradient for a very similar issue. I haven't found anything better anywhere on stack, so I suppose I'll add it here. It's especially nice and easy if you only want top and bottom, or side shadows.
I added a top and bottom inner box shadow to an image with full width and 140 height. You could create multiple gradients to make an outer box shadow. Don't forget about the corners. You can use the start and end props to make angled shadows / gradients, maybe that'll work for corners if you need them.
<ImageBackground
source={imagePicker(this.props.title)}
style={styles.image}
>
<LinearGradient
colors={[
'transparent',
'transparent',
'rgba(0,0,0,0.2)',
'rgba(0,0,0,0.6)'
]}
start={[0,0.9]}
end={[0,1]}
style={styles.image_shadows}
/>
<LinearGradient
colors={[
'rgba(0,0,0,0.6)',
'rgba(0,0,0,0.2)',
'transparent',
'transparent'
]}
start={[0,0]}
end={[0,0.1]}
style={styles.image_cover}
/>
</ImageBackground>
const styles = StyleSheet.create({
image: {
flex: 1,
resizeMode: "stretch",
justifyContent: "center",
paddingTop:90,
paddingLeft:10,
height:140,
flexDirection: 'row',
},
image_shadows: {
position: 'absolute',
left: 0,
right: 0,
top: 0,
height: 140
}
}
If you use expo you can install it with 'expo install expo-linear-gradient' Expo Docs. If not, I believe react-native-linear-gradient is similar React-Native-Linear-Gradient github.
I have a simple progress bar, it has a borderRadius and overflow set to hidden. I have a child of this, it has no borderRadius, and it is overflowing outside of the corners. Here is my markup:
<View style={style.progressbar}>
<View style={[style.progressbarfill, { width:'50%' }]} />
</View>
const style = {
progressbar: {
backgroundColor: '#ccc',
height: 25,
width: '90%',
borderRadius: 12,
overflow: 'hidden'
},
progressbarfill: {
backgroundColor: 'springgreen',
width: '10%',
height: '100%'
}
}
This is what it looks like:
I put arrows on where the green is covering the border. The green should not overflow outside the edges.
Does anyone know why this is?
Actually I'm testing it right now, seems to be working fine on iOS, but Android is the one having the issue with the overflow right now. It looks like that is still getting more support currently. A temporary fix, is to just add the same borderRadius on the progressbarfill.
Here is the issue on the React Native Docs:
The overflow style property defaults to hidden and cannot be changed
on Android This is a result of how Android rendering works. This
feature is not being worked on as it would be a significant
undertaking and there are many more important tasks.
Another issue with overflow: 'hidden' on Android: a view is not
clipped by the parent's borderRadius even if the parent has overflow:
'hidden' enabled – the corners of the inner view will be visible
outside of the rounded corners. This is only on Android; it works as
expected on iOS. See the corresponding issue.
I found that, in addition to overflow: 'hidden' needed on the parent, I also needed backgroundColor: 'transparent' added to the parent
Edit: I also found that sometimes testing this required a refresh of my app.