Current Behavior
I'm creating my tabs like this (note: Home is a StackNavigator screen):
ProfileTab is rendered this way (items is an array of inputs):
return <ScrollView contentContainerStyle={{flex: 1, backgroundColor: Colors.primaryShade3,
paddingTop: Sizes.paddingTop}}>
<View style={{flexDirection: "row", alignItems: "center", marginBottom: 50}}>
<Image source={{uri: RNStorage.userProfile.user.photo}}
style={{marginRight: 20, resizeMode: "contain", width: 70, height: 70, borderRadius: 50}}/>
<Text style={{color: Colors.white, fontSize: Sizes.h2}}>
Bem vindo, {RNStorage.userProfile.user.givenName}
</Text>
</View>
{items}
</ScrollView>
All inputs follow this structure:
Currently having this behavior (Not scrolling):
Expected Behavior
Scroll should work normally. I also tested using the ScrollView of the react-native-gesture-handler but it didn't work either.
This is unrelated to material-bottom-tabs.
You need to remove flex: 1 from contentContainerStyle. Otherwise your view will fill available scrollable area and won't be scrollable.
Related
I'm reading the Flex layout in React Native but I'm still unable to make the Middle (white box) to take what ever available left (without fixed width, since different device will have different width). Also struggling to make the green box always go to the end.
How would I layout this?
This can be solve by adding:
flexGrow:1
you can take references:
https://demos.scotch.io/visual-guide-to-css3-flexbox-flexbox-playground/demos/
You can do that by using flex
<View style={{flexDirection: 'row', height: 300, alignItems: 'center'}}>
<View style={{width: 40, backgroundColor: 'blue'}} />
<View style={{flex: 1, backgroundColor: 'white'}} />
<View style={{width: 30, backgroundColor: 'green'}} />
</View>
<View style={{flexDirection: 'row', width: '100%', height: 100}}>
<View style={{backgroundColor: 'blue', width: 40}}></View>
<View style={{backgroundColor: 'white', flexGrow: 1}}></View>
<View style={{backgroundColor: 'green', width: 30}}></View>
</View>
Setting flexGrow: 1 works for me.
For the life of me, I can't center the headerTitle component. Ideas?
class GroupSelectionScreen extends React.Component{
static navigationOptions = ({navigation}) => {
return {
headerLeft: <View>
<Image source={logoImg} style={{width:72, height:33, marginLeft:5}}/>
</View>,
headerStyle: {
backgroundColor: theme.colors.darkBlue,
height: 75,
},
headerTitle: <View style={{
alignItems: "center",
flexDirection: 'row',
}}>
<View style={{backgroundColor: statusColor, width: 15, height: 15, borderRadius: 8}}></View>
<Text style={{color: 'white', fontSize: 25}}>{username}</Text>
</View>,
headerRight: <SetStatusButton onPress={navigation.getParam('toggleSetStatus')}/>,
};
};
Because you are using flexDirection:'row' you will probably want to add the property justifyContent:'center' to center the content of the view horizontally
This is due to the fact that justifyContent works on the primary axis and alignItems work on the secondary axis. Setting the flexDirection as row changes the primary axis to be row.
Adding flexDirection to a component's style determines the primary axis of its layout.
Adding justifyContent to a component's style determines the distribution of children along the primary axis.
You can see more in the docs
https://facebook.github.io/react-native/docs/flexbox
Here is a snack https://snack.expo.io/#andypandy/flexdirection
Each of the three views have flexDirection: 'row'
The first view has justifyContent: 'center' and the text is centred horizontally.
The second view has alignItems: 'center' and the text is centred vertically.
The third view has both justifyContent: 'center' and alignItems: 'center' and the text is centred horizontally and vertically
Here is an image of what it looks like
And here is the code
<View>
<View style={{flexDirection: 'row', justifyContent: 'center', backgroundColor: 'yellow', height: 100, width: 100, margin: 10}} >
<Text>Hello</Text>
</View>
<View style={{flexDirection: 'row', alignItems: 'center', backgroundColor: 'cyan', height: 100, width: 100, margin: 10}} >
<Text>Hello</Text>
</View>
<View style={{flexDirection: 'row', justifyContent: 'center', alignItems:'center', backgroundColor: 'forestgreen', height: 100, width: 100, margin: 10}} >
<Text>Hello</Text>
</View>
</View>
Update
In react-navigation there appears to be a difference between how headerTitle given by the question poster is handled in Android and iOS.
In iOS the headerTitle centres vertically and horizontally, however in Android it centres only vertically and is aligned left. Obviously this is not ideal.
There is a way to make it work in both iOS and Android, simply
Wrap the original header in a View with flex:1
Make sure the original header's View has a style with justifyContent: 'center' and alignItems: 'center'
Here is the code for the new headerTitle
<View style={{flex: 1}}>
<View style={{flexDirection: 'row', justifyContent: 'center', alignItems: 'center'}}>
<View style={{backgroundColor: 'green', width: 15, height: 15, borderRadius: 8}}/>
<Text>Spencer</Text>
</View>
</View>
Here is a snack showing it working https://snack.expo.io/#andypandy/navigation-header
Trying to use put space-between and stretch out the buttons that appear in the overlay pop-up screen using flexbox. This is a child view of the main view of the screen. Nothing but alignItems: 'center' seems to be working to align these buttons.
Any help to get the other flexbox properties to work on this child view would be much appreciated
<View style={{ flex: 1 }}>
<ImageBackground
style={{ width: Dimensions.get("window").width, height: 300 }}
source={require("../../resources/img/image.jpeg")}
/>
<View style={{ marginTop: -20, paddingLeft: 20, paddingRight: 20 }}>
<MainButton onPress={this.openOverlay} size={MainButtonSize.medium}>
{this.bookButton}
</MainButton>
</View>
<Overlay
visible={this.state.modalVisible}
onClose={this.onClose}
closeOnTouchOutside
animationType="zoomIn"
containerStyle={{ backgroundColor: "rgba(255, 255, 255, 0.78)" }}
childrenWrapperStyle={{ backgroundColor: "red" }}
animationDuration={350}
>
{(hideModal, overlayState) => (
<View style={{ alignItems: "center" }}>. <== THIS VIEW
<MainButton size={MainButtonSize.large} onPress={this.onStaffPress}>
{this.staffButton}
</MainButton>
<MainButton size={MainButtonSize.large} onPress={this.onServicesPress}>
{this.serviceButton}
</MainButton>
<MainButton size={MainButtonSize.small} onPress={this.onClose}>
{this.closeButton}
</MainButton>
</View>
)}
</Overlay>
</View>
Please try to set flex: 1 in the View tag
I am struggling with the layout in a view. I am trying to place the random picture(in this case starbucks logo) to the left of the blue view. I would like it to be aligned with left border. No matter what layout properties i use for it, it doesn't work as i would expect.
logoStyle:{
width: 210,
height: 120,
left: 0,
resizeMode: 'contain',
backgroundColor: 'blue',
},
Here is how it looks
You want put image logo on the left of background view. Here's example:
render() {
<View style={{flex: 1, backgroundColor: 'blue'}}>
<View style={{ flexDirection: 'row',
alignItems: 'flex-start', justifyContent: 'flex-start'}} >
<Image style={{width: 20, height: 20}} />
</View>
</View>
}
You can try it!
Cheer!
I have an element that I want to float right, for example
<View style={{width: 300}}>
<Text style={{backgroundColor: "#DDD"}}>Hello</Text>
</View>
How can the Text be floated / aligned to the right? Also, why does the Text take up the full space of the View, instead of just the space for "Hello"?
why does the Text take up the full space of the View, instead of just the space for "Hello"?
Because the View is a flex container and by default has flexDirection: 'column' and alignItems: 'stretch', which means that its children should be stretched out to fill its width.
(Note, per the docs, that all components in React Native are display: 'flex' by default and that display: 'inline' does not exist at all. In this way, the default behaviour of a Text within a View in React Native differs from the default behaviour of span within a div on the web; in the latter case, the span would not fill the width of the div because a span is an inline element by default. There is no such concept in React Native.)
How can the Text be floated / aligned to the right?
The float property doesn't exist in React Native, but there are loads of options available to you (with slightly different behaviours) that will let you right-align your text. Here are the ones I can think of:
1. Use textAlign: 'right' on the Text element
<View>
<Text style={{textAlign: 'right'}}>Hello, World!</Text>
</View>
(This approach doesn't change the fact that the Text fills the entire width of the View; it just right-aligns the text within the Text.)
2. Use alignSelf: 'flex-end' on the Text
<View>
<Text style={{alignSelf: 'flex-end'}}>Hello, World!</Text>
</View>
This shrinks the Text element to the size required to hold its content and puts it at the end of the cross direction (the horizontal direction, by default) of the View.
3. Use alignItems: 'flex-end' on the View
<View style={{alignItems: 'flex-end'}}>
<Text>Hello, World!</Text>
</View>
This is equivalent to setting alignSelf: 'flex-end' on all the View's children.
4. Use flexDirection: 'row' and justifyContent: 'flex-end' on the View
<View style={{flexDirection: 'row', justifyContent: 'flex-end'}}>
<Text>Hello, World!</Text>
</View>
flexDirection: 'row' sets the main direction of layout to be horizontal instead of vertical; justifyContent is just like alignItems, but controls alignment in the main direction instead of the cross direction.
5. Use flexDirection: 'row' on the View and marginLeft: 'auto' on the Text
<View style={{flexDirection: 'row'}}>
<Text style={{marginLeft: 'auto'}}>Hello, World!</Text>
</View>
This approach is demonstrated, in the context of the web and real CSS, at https://stackoverflow.com/a/34063808/1709587.
6. Use position: 'absolute' and right: 0 on the Text:
<View>
<Text style={{position: 'absolute', right: 0}}>Hello, World!</Text>
</View>
Like in real CSS, this takes the Text "out of flow", meaning that its siblings will be able to overlap it and its vertical position will be at the top of the View by default (although you can explicitly set a distance from the top of the View using the top style property).
Naturally, which of these various approaches you want to use - and whether the choice between them even matters at all - will depend upon your precise circumstances.
You can directly specify the item's alignment, for example:
textright: {
alignSelf: 'flex-end',
},
For me setting alignItems to a parent did the trick, like:
var styles = StyleSheet.create({
container: {
alignItems: 'flex-end'
}
});
You are not supposed to use floats in React Native. React Native leverages the flexbox to handle all that stuff.
In your case, you will probably want the container to have an attribute
justifyContent: 'flex-end'
And about the text taking the whole space, again, you need to take a look at your container.
Here is a link to really great guide on flexbox: A Complete Guide to Flexbox
<View style={{ flex: 1, flexDirection: 'row', justifyContent: 'flex-end' }}>
<Text>
Some Text
</Text>
</View>
flexDirection: If you want to move horizontally (row) or vertically (column)
justifyContent: the direction you want to move.
Use flex: 1 and alignItems: 'flex-end' in View styling. Make sure to include flex: 1. That is the key to make the element float right
using flex
<View style={{ flexDirection: 'row',}}>
<Text style={{fontSize: 12, lineHeight: 30, color:'#9394B3' }}>left</Text>
<Text style={{ flex:1, fontSize: 16, lineHeight: 30, color:'#1D2359', textAlign:'right' }}>right</Text>
</View>
You can float:right in react native using flex:
<View style={{flex: 1, flexDirection: 'row'}}>
<View style={{width: 50, height: 50, backgroundColor: 'powderblue'}} />
<View style={{width: 50, height: 50, backgroundColor: 'skyblue'}} />
<View style={{width: 50, height: 50, backgroundColor: 'steelblue'}} />
</View>
for more detail: https://facebook.github.io/react-native/docs/flexbox.html#flex-direction
const styles = StyleSheet.create({
flowRight: {
flex:1,
justifyContent: 'end',
alignContent: 'end',
},
});
Then call styles.flowRight in your style
You can just style the text with alignSelf: 'flex-end':
<View style={{width: 300}}>
<Text style={{backgroundColor: "#DDD", alignSelf: 'flex-end'}}>Hello</Text>
</View>