How to use KeyboardAvoidingView with FlatList? - ios

Question

I have a FlatList component with an Input inside each row. When I select the input I want it to scroll up above the keyboard.
My code:
return (
<KeyboardAvoidingView behavior='padding' style={{ flex: 1 }} >
<FlatList
style={{ flex: 1, backgroundColor: '#fff' }}
data={ds}
renderItem={({ item }) => <ListItem data={item} />}
ListFooterComponent={this.renderButton}
/>
</KeyboardAvoidingView>
);
In this scenario, the FlatList is never loaded. When I delete flex:1 from both components, FlatList renders properly but selecting an Input does not make it scroll up

Answer 1

You can trying using react-native-keyboard-aware-scroll-view
https://github.com/APSL/react-native-keyboard-aware-scroll-view
It comes with KeyboardAware[ScrollView, ListView, SectionView, FlatList] which accepts the same props as their corresponding components from RN. I have used that and it worked for me.
render() {
return (
<KeyboardAwareFlatList
style={{flex: 1}}
data={this.state.data}
renderItem={({item}) => (
<View style={{flex: 1}}>
<Image
source={item.v}
style={{height:200, width: 200}}
/>
<TextInput
placeholder="enter text1"
/>
</View>
)}
/>
);
}

Answer 2

You could try using the library react-native-keyboard-spacer as an alternative to KeyboardAvoidingView.
Install:
npm install --save react-native-keyboard-spacer
Use it like this:
import KeyboardSpacer from 'react-native-keyboard-spacer'
...
<View style={{flex: 1}}>
<FlatList
style={{flex: 1}}
data={ds}
renderItem={({ item }) => <ListItem data={item} />}
/>
{/* The view that will expand to match the keyboard height */}
<KeyboardSpacer />
</View>

Answer 3

Try this:
<KeyboardAvoidingView behavior='position' keyboardVerticalOffset={xyz} >
You can remove the property 'keyboardVerticalOffset' or play with the value of xyz,
just find out the better value which fits in your case.

Answer 4

For anyone on a similar path as mine. I was not able to use KeyboardAvoidingView because it depends on ScrollView which conflicts with Flatlist. I couldn't used the header and footer option in Flatlist as I'm using it as a generated thing in a search selection box so it has to be contained.
For me there is a difference in how Android and iOS calculate absolute position. Android considers the bottom to be the top of the keyboard and iOS it is the bottom of the screen when the keyboard is showing.
It turns out to be not that difficult to just put a View around the content you want to remain above the keyboard and just dynamically set the height of it on iOS. This isn't even really necessary on Android as it follows the keyboard if the View is position: absolute and bottom: 0.
This heavily borrows from here: https://stackoverflow.com/a/60682069/438322
Thanks to Kevin Amiranoff
Here's a basic example using hooks.
function YourComponent(props){
const onKeyboardWillShow = e => {
setKeyboardHeight(e.endCoordinates.height);
};
const onKeyboardWillHide = () => {
setKeyboardHeight(0);
};
useEffect(() => {
// These listeners on ios are a little more snappy but not available on Android
// If you want to use this on Android use keyboardDidShow/Hide
if (Platform.OS === 'ios') {
Keyboard.addListener('keyboardWillShow', onKeyboardWillShow);
Keyboard.addListener('keyboardWillHide', onKeyboardWillHide);
}
return () => {
if (Platform.OS === 'ios') {
Keyboard.removeListener('keyboardWillShow', onKeyboardWillShow);
Keyboard.removeListener('keyboardWillHide', onKeyboardWillHide);
}
};
}, []);
const buttonHeight = 50;
return(
<View>
<Content bla={'bla'}/>
<View style={{
height: Platform.OS === 'ios'
? keyboardHeight + buttonHeight : buttonHeight,
position: 'absolute',
bottom: 0
}}>
{/* Keep this button above the keyboard */}
<Button style={{ height: buttonHeight }}/>
</View
</View>
)
}

Answer 5

this is my solution.
inverted={true} is the key
const dummy = [1,2,3,4,5,6,7,8,9,10]
<KeyboardAvoidingView >
<FlatList
data={dummy.reverse()}
inverted={true}
/>
</KeyboardAvoidingView>