I tried rgba(156, 39, 176, 1) but it does not cover the color under it.
How can I make the purple color circle cover the part of background bell?
First try setting zIndex on the badge to make it render on top. However Android has some zIndex issues, so if that doesn't work then you have to render it after. So you have this right now:
<View>
<Badge>
<Image>
</View>
You need to do:
<View>
<Image>
<Badge>
</View>
You can use react-native-icon-badge to create this notification icon symbol with count.
<View style={styles.container}>
<IconBadge
MainElement={
<View>
<Image
style={{width:60,height:60,margin:3}}
source={bell}
/>
</View>
}
BadgeElement={
<Text style={{color:'#FFFFFF'}}>3</Text>
}
IconBadgeStyle={
{width:30,
height:30,
backgroundColor: '#9c27b0'}
}
Hidden={this.state.BadgeCount==0}
/>
</View>
Related
I have the following code in my RN application.
<TouchableOpacity
// onPress={onPress}
onPressIn={this.handlePressIn}
onPressOut={this.handlePressOut}
disabled={disabled}
style={[
styles.button,
buttonStyle,
this.buttonStyles(),
]}
>
<Text>Hello</Text>
</TouchableOpacity>
I want to change the color of TouchableOpacity when it is being pressed. So, in onPressIn, I changed the color to darkRed, but it display a light red or something similar to that. No dark color can be set there. What is the issue here? How can I change the color till I onPressOut? The color should be a dark one.
Found the solution. Set your activeOpacity={1} in your TouchableOpacity.
<TouchableOpacity
onPress={onPress}
activeOpacity={1}
/>
Edit:
I guess I overengineered it a little bit. You can simply use the activeOpacity={1} prop.
Problem:
The problem is that TouchableOpacity already provides feedback by reducing the opacity of the button, allowing the background to be seen through while the user is pressing down. So even if you change the backgroundcolor of the button, you won't notice it. Fortunately, I have a solution for you.
Solution:
You can use TouchableWithoutFeedback together with an additional View to create your wanted behavior.
Code:
<TouchableWithoutFeedback
onPressIn={() => this.setState({pressIn: true })}
onPressOut={() => this.setState({pressIn: false})}
>
<View
// change the color depending on state
style={{ backgroundColor: this.state.pressIn ? '#4c7d4c': '#98FB98'}}
>
<Text> Custom Button </Text>
</View>
</TouchableWithoutFeedback>
Output:
Working Example:
https://snack.expo.io/#tim1717/quiet-watermelon
My all screen has a scrollView, and there's a in the middle of it. I want when someone scroll up, the text be fixed at the top and does not disappear. How can I do that? I didn't find it anywhere, thanks.
<View style={styles.container}>
<Text style={{ position : 'absolute', textAlign: 'center'}}>
Special Text
</Text>
<ScrollView>
</ScrollView>
</View>
you can do something like this
Use css property position: sticky. that will fixed your text at the top it's called sticky position. So, Please read it https://www.w3schools.com/css/tryit.asp?filename=trycss_position_sticky
Be patient.
Cheer you!
i was trying to implement something similar and i got it done but unfortunately it is kinda complex (relatively) at least compared to what you would do on the web. it requires using the onLayout prop.
state = {zIndex: 0};
<View>
<View style={[your_style, {position: "relative", zIndex: this.state.zIndex}]} onLayout={({nativeEvent}) => {this.outTextHeight = nativeEvent.layout.height}}>
<Text>Special Text</Text>
</View>
<View style={{[your_style, {zIndex: 1}]}>
<ScrollView onScroll={({nativeEvent}) => {if(nativeEvent.contentOffset.y >= (this.insideTextHeight + this.insideTextOffsety){this.setState({zIndex: 2})})}}>
// your content
<View onLayout={({nativeEvent}) => {this.insideTextHeight = nativeEvent.layout.height; this.insideTextOffsety = nativeEvent.layout.y}}>// this maybe the same height so may be unnecessary
<Text>Special Text</Text>
</View>
</ScrollView>
</View>
</View>
I have a toolbar in my RN app. That toolbar has a button that is oversized on purpose and is overflowing from the component.
The oversized button is covered by an other component in the same page.
touchable:{
backgroundColor:'#3d3d3d',
borderRadius:27.5,
position:'absolute',
left:width/2 -25,
bottom:10,
alignItems:'center',
borderColor:'black',
width:55,
height:55,
justifyContent:'center',
}
Mark up:
render() {
return (
<View style={{flex: 1}}>
<View style={{position:'absolute', width:42,height:42,left:20,top:(height-42)/3,zIndex:3}}>
<Image style={{}} source={require('./Images/Ellipse 36.png')} />
<Image style={{position:'absolute',top:14,left:14}} source={require('./Images/Asset 65.png')} />
</View>
<View style={{position:'absolute', width:42,height:42,right:20,top:(height-42)/3,zIndex:3}}>
<Image style={{}} source={require('./Images/Ellipse 36.png')} />
<Image style={{position:'absolute',top:10,left:12}} source={require('./Images/Asset 66.png')} />
</View>
<View><TopToolbar text='Swipe' navigator={this.props.navigator} user={this.props.user}/></View>
<ScrollView style={{zIndex:1,}}><Inders style={{flex: 1}} navigator={this.props.navigator} credentials={this.props.credentials}/></ScrollView>
<View style={{zIndex:0,}}><BottomToolbar user={this.props.user} navigator={this.props.navigator} credentials={this.props.credentials}/></View>
</View>
)
}
Where Inders is a component.
I tried changing the order of the components but it didn't work.
What is the way to make a button "float" from another component?
Open inspector in the Dev tools menu and find out who cut your component, I also like to set backgroundColor to see their position, it make solve this type of bugs mack more easy.
The solution is to wrap the toolbar in another View, so that the new View is the parent of the element that you want to "float".
If I try to scroll to the bottom of my ScrollView, it bounces back to its default position and won't let me view the entirety of its content.
My ( truncated ) setup is fairly simple :
<View>
<View>
<ABunchOfStuff />
</View>
<View style={styles.sectionNode} >
<ABunchOfStuff />
</View>
<ScrollView> <------ My broken ScrollView :(
<View>
<ABunchOfStuff />
</View>
</ScrollView>
</View>
This is a simplified version of my actual code. But I'm reaching the conclusion that there's some kind of "unbounded height" going on as in this reference.
I did try making sure everything and all parents have flex: 1 all the way to the child <View> of my <ScrollView> and up to its parents. But that didn't seem to do the trick.
Any idea on how to debug this? I know ReactNative's website recommends this and says it would be easy to do in the inspector ( but with no instructions on how to do it ). If my assumption that there's an "unbounded height" issue, how would one go about and find this rascal unbounded node? Or is it something else?
Try taking flex out of the ScrollView entirely and just put flex: 1 on the parent. That did the trick for me.
For me the problem was setting a paddingVertical, paddingTop or paddingBottom on the ScrollView. Just don't do that. it influences the height of the content of the ScrollView, without the ScrollView adjusting to it appropriately.
The parent view must have style={{flex: 1}} then the scrollview can have style={{flex: 1}} 🥇
The bounded height thingy means the ScrollView itself must be bound.
If the ScrollView has unbounded height, it will stretch with your content and won't scroll.
You can just add height to the ScrollView and see how this works, from there on you can use absolute height or use flex in a way that will limit the ScrollView height to what you want.
This worked for me:
<View style={{flex: 1}}>
<ScrollView>
<View style={{paddingTop: 16, paddingBottom: 16}}>
<SearchBar />
<ItemsContainer />
</View>
</ScrollView>
</View>
You must make sure that ScrollView has fixed height, either by setting it for parents or for itself.
I use flex to set its height instead of specifying it directly so it works on all screen size. So for your code something like
<View style={{flex: 1}}>
<View>
<ABunchOfStuff />
</View>
<View style={styles.sectionNode} >
<ABunchOfStuff />
</View>
<ScrollView style={{flex:0.8}}>
<View>
<ABunchOfStuff />
</View>
</ScrollView>
</View>
More information in react native docs
This works for me
<ScrollView>
<View style={{height:2000}}>
</View>
<ScrollView>
The important thing is to put a defined height for the elements that are inside the ScrollView
<ScrollView style={{flex: 1, marginBottom: 30}} />
items
</ScrollView>
What worked for me was to wrap the ScrollView in View. Then giving the View a height and setting flex : 1 on ScrollView.
Something like this:
<View style={{ height: "60%" }}>
<ScrollView style={{ flex: 1 }}>
<List/>
</ScrollView>
</View>
The suggested answers above with parent flex: 1 and child flex: 1 work, but this thing was causing my bug.
I had <Image> with percentage height and once I replaced the percentage with a number, it fixed the issue.
this will solve your problem
<ScrollView
contentContainerStyle={{flexGrow:1,justifyContent:'space-
between'}}
>
<The Other Components or Lists/>
</ScrollView>
add <Text></Text>
at the bottom inside scrollview. it will give some space
When I wrap content like this example below, it scrolls Perfectly..
return(
<ScrollView>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
...
</ScrollView>
);
However, whenever I wrap it in another View, It will not scroll.
return(
<View>
<ScrollView>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
...
</SCrollView>
</View>
);
Is there some sort of fix to this. I am trying to put a nav bar header above all of the content, couldn't really figure it out though.
It's a typo:
Your closing ScrollView tag is: </SCrollView> rather than </ScrollView>.
You also need to add a style to the View container, here's an example of what it should look like:
return(
<View style={{flex: 1}}>
<ScrollView>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
...
</ScrollView>
</View>
);
Try next code:
<ScrollView contentContainerStyle={{ flexGrow: 1 }}>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
</ScrollView>
If your ScrollView is within something that handles touch (Pressable, TouchableWithoutFeedback etc) then you either need to stop the touch event propagating up to that parent handler or else the ScrollView won't handle the touch event and therefore won't scroll.
This can be done either with onStartShouldSetResponder={() => true} or by wrapping the children in an element which itself handles the touch event (e.g. Pressable):
return (
<ScrollView>
<Pressable>
<Text>This is scrollable</Text>
<Pressable>
<Pressable>
<Text>As is this</Text>
<Pressable>
</ScrollView>
);
Try adding style={{flex:1}} to <View> and <ScrollView> components. You also have a typo on your code: </SCrollView> in line 9. An example code will look like this:
<View style={{backgroundColor:'white', flex:1}}>
<NavigationBar title="Title" />
<ScrollView style={{flex:1, backgroundColor:'white'}}>
<View style={{flex:1,justifyContent:'center'}}>
<RegisterForm />
</View>
</ScrollView>
</View>
Another solution is to add a height property to the parent View container. This sometimes works well when calculating the height against the screen height.
render () {
const screenHeight = Dimensions.get('window').height
return(
<View style={{height: screenHeight}}>
<ScrollView>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
...
</ScrollView>
</View>
)
}
I have tried all of these solutions and none were working. Then I just fully restarted the app and the metro server and everything worked fine.
As #Evan Siroky has answered above it's working well I'm just adding on thing for a auto height in case you don't want to reserve the space
render () {
const screenHeight = Dimensions.get('window').height
return(
<View style={{ Height: "auto", maxHeight: screenHeight}}>
<ScrollView>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
<Text> TEST </Text>
...
</ScrollView>
</View>
)
}
I had a similar issues, it got solved by removing height/width if set to '100%'.
Just adding here if someone faces the same issues. :D
Set nestedScrollEnabled as true for Hybrid Android + react app as it might be issue with gesture/click for scrolling issue.
Just if anyone is as desperate as I was:
My view was inside a StackNavigator. In the StackNavigator you can assign a default cardStyle. This card style needs height: "100%".
For me this was the case but I had overwritten it within the cardStyle of the Stack.Screen definition.
See this working example:
// This is the stack navigator
<ModalStack.Navigator screenOptions={() => ({
cardStyle: {height: "100%"}
});}}>
<ModalStack.Screen name={ScreenItemDetail} options={{
// cardStyle: {} be sure to not override card style again!
}} component={ItemDetailScreen} />
// ...
</ModalStack.Navigator>
removing contentContainerStyle prop from the ScrollView has fixed the issue for me
Just add ScrollView as parent View if it's still not working for you...just restart your app or server and your ScrollView will work fine. Because sometimes our app freezes for no reason.
I think the best way of doing this is to put all requires inside an array and map this array.
const images = [
require('../your/path/here'),
require('../other/image/here'),
...
];
return ( {images.map((image) => <Image ... source={image} />)
note that if you want it as a background image with other elements above the image, you may use BackgroundImage and either render elements for each image or position absolute the image map and zIndex it behind all things