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I'm having an issue with scrolling in lists that are in modals ever since upgrading to the latest React-Native version (0.55.4). In this case it is a Flatlist
The Flatlist with the problem is inside a modal, which is in another modal that is rendered as a footer ponent on another Flatlist (it is an add button).
Please help! Thank you
Code:
Flatlist Footer Component (Add Button):
@observer
class AddButton extends Component {
@observable visible = false;
constructor(props) {
super(props);
this.state = {
mergeName: '',
coin: undefined
};
}
show = () => {
this.visible = true;
};
hide = () => {
this.visible = false;
};
render() {
return (
<View>
<Button
primary
onPress={() => {
this.show();
}}
title={'add'}
style={{
width: '50%',
alignSelf: 'center',
marginVertical: 16
}}
/>
<Modal
visible={this.visible}
animationType='slide'
onRequestClose={this.hide}
>
<Screen>
<View style={{ padding: 5, backgroundColor: '#0003' }}>
<TouchableOpacity
style={{
width: '50%',
height: 40,
paddingHorizontal: 10,
justifyContent: 'center'
}}
onPress={this.hide}
>
<Text style={{ color: '#fff' }}>
{'cancel'}
</Text>
</TouchableOpacity>
</View>
<View>
<Row>
<RowLabel>{'coin'}:</RowLabel>
<Selector
force
ref={'mySelector'}
value={this.coin}
onSelect={coin => {
this.handleSelect();
}}
data={allCoins}
/>
</Row>
<Button
primary
onPress={this.handleSubmit}
title={this.props.i18n.'add'}
style={{
width: '50%',
alignSelf: 'center',
marginVertical: 16
}}
/>
</View>
</Screen>
</Modal>
</View>
);
}
}
export default AddButton;
const contentStyle = {
flex: 1,
backgroundColor: '#0003',
paddingLeft: 10,
borderRadius: 3
};
const Row = ({ style, ...rest }) => (
<View
style={[
{
height: 60,
flexDirection: 'row',
alignItems: 'center',
padding: 10,
marginRight: 10
},
style
]}
{...rest}
/>
);
const RowLabel = props => (
<Text style={{ width: 80, color: '#ccc' }} {...props} />
);
const Input = (props: TextInputProperties) => (
<View style={contentStyle}>
<TextInput
placeholderTextColor='#fff3'
style={{ color: '#ccc', flex: 1, fontSize: 14 }}
{...props}
/>
</View>
);
Problematic Flatlist in Modal Component (Selector):
@observer
class Selector extends Component {
@observable value = '';
@observable visible = false;
constructor(props) {
super(props);
if (props.modify) {
this.selectValue();
}
}
selectValue = () => {
this.value = this.props.value;
};
show = () => {
if (this.props.force) this.visible = true;
if (!this.props.coin) return;
this.visible = true;
};
hide = () => {
this.filterText = '';
this.visible = false;
};
handleSelect = item => {
this.value = item;
if (typeof this.props.onSelect === 'function') {
this.props.onSelect(item);
}
this.hide();
};
ponentWillReceiveProps(nextProps) {
if (nextProps.value !== this.value) {
this.value = nextProps.value || '';
}
}
renderItem = ({ item }) => {
return (
<TouchableOpacity
onPress={() => this.handleSelect(item)}
style={{
backgroundColor: '#fff',
height: 40,
paddingLeft: 10,
justifyContent: 'center'
}}
>
<Text style={{ fontSize: 14, color: '#333' }}>
{item.toUpperCase()}
</Text>
</TouchableOpacity>
);
};
render() {
let data = this.props.data;
return (
<View style={[ contentStyle, { justifyContent: 'center' } ]}>
<TouchableOpacity
style={{
flex: 1,
flexDirection: 'row',
alignItems: 'center'
}}
onPress={this.show}
>
<Text
numberOfLines={1}
style={{ color: this.value ? '#ccc' : '#fff3' }}
>
{(
this.value ||
this.props.placeholder ||
''
).toUpperCase()}
</Text>
</TouchableOpacity>
<Modal
transparent
animationType='fade'
visible={this.visible}
onRequestClose={this.hide}
>
<View
style={{
flex: 1,
backgroundColor: '#0005',
alignItems: 'center',
paddingTop: 80
}}
>
<View
style={{
width: '80%',
backgroundColor: '#fff',
borderRadius: 5,
maxHeight: '80%',
overflow: 'hidden'
}}
>
<FlatList
data={data}
keyExtractor={i => i}
getItemLayout={(_, index) => {
const height = 40 + HairSpacer.width;
return {
length: height,
offset: height * index,
index
};
}}
ItemSeparatorComponent={HairSpacer}
renderItem={this.renderItem}
/>
</View>
<TouchableOpacity
onPress={this.hide}
style={{ marginTop: 12 }}
>
<Icon
name='ios-close-circle'
size={50}
color='#ccc'
/>
</TouchableOpacity>
</View>
</Modal>
</View>
);
}
}
export default Selector;
const contentStyle = {
flex: 1,
backgroundColor: '#0003',
paddingLeft: 10,
borderRadius: 3
};
I'm having an issue with scrolling in lists that are in modals ever since upgrading to the latest React-Native version (0.55.4). In this case it is a Flatlist
The Flatlist with the problem is inside a modal, which is in another modal that is rendered as a footer ponent on another Flatlist (it is an add button).
Please help! Thank you
Code:
Flatlist Footer Component (Add Button):
@observer
class AddButton extends Component {
@observable visible = false;
constructor(props) {
super(props);
this.state = {
mergeName: '',
coin: undefined
};
}
show = () => {
this.visible = true;
};
hide = () => {
this.visible = false;
};
render() {
return (
<View>
<Button
primary
onPress={() => {
this.show();
}}
title={'add'}
style={{
width: '50%',
alignSelf: 'center',
marginVertical: 16
}}
/>
<Modal
visible={this.visible}
animationType='slide'
onRequestClose={this.hide}
>
<Screen>
<View style={{ padding: 5, backgroundColor: '#0003' }}>
<TouchableOpacity
style={{
width: '50%',
height: 40,
paddingHorizontal: 10,
justifyContent: 'center'
}}
onPress={this.hide}
>
<Text style={{ color: '#fff' }}>
{'cancel'}
</Text>
</TouchableOpacity>
</View>
<View>
<Row>
<RowLabel>{'coin'}:</RowLabel>
<Selector
force
ref={'mySelector'}
value={this.coin}
onSelect={coin => {
this.handleSelect();
}}
data={allCoins}
/>
</Row>
<Button
primary
onPress={this.handleSubmit}
title={this.props.i18n.'add'}
style={{
width: '50%',
alignSelf: 'center',
marginVertical: 16
}}
/>
</View>
</Screen>
</Modal>
</View>
);
}
}
export default AddButton;
const contentStyle = {
flex: 1,
backgroundColor: '#0003',
paddingLeft: 10,
borderRadius: 3
};
const Row = ({ style, ...rest }) => (
<View
style={[
{
height: 60,
flexDirection: 'row',
alignItems: 'center',
padding: 10,
marginRight: 10
},
style
]}
{...rest}
/>
);
const RowLabel = props => (
<Text style={{ width: 80, color: '#ccc' }} {...props} />
);
const Input = (props: TextInputProperties) => (
<View style={contentStyle}>
<TextInput
placeholderTextColor='#fff3'
style={{ color: '#ccc', flex: 1, fontSize: 14 }}
{...props}
/>
</View>
);
Problematic Flatlist in Modal Component (Selector):
@observer
class Selector extends Component {
@observable value = '';
@observable visible = false;
constructor(props) {
super(props);
if (props.modify) {
this.selectValue();
}
}
selectValue = () => {
this.value = this.props.value;
};
show = () => {
if (this.props.force) this.visible = true;
if (!this.props.coin) return;
this.visible = true;
};
hide = () => {
this.filterText = '';
this.visible = false;
};
handleSelect = item => {
this.value = item;
if (typeof this.props.onSelect === 'function') {
this.props.onSelect(item);
}
this.hide();
};
ponentWillReceiveProps(nextProps) {
if (nextProps.value !== this.value) {
this.value = nextProps.value || '';
}
}
renderItem = ({ item }) => {
return (
<TouchableOpacity
onPress={() => this.handleSelect(item)}
style={{
backgroundColor: '#fff',
height: 40,
paddingLeft: 10,
justifyContent: 'center'
}}
>
<Text style={{ fontSize: 14, color: '#333' }}>
{item.toUpperCase()}
</Text>
</TouchableOpacity>
);
};
render() {
let data = this.props.data;
return (
<View style={[ contentStyle, { justifyContent: 'center' } ]}>
<TouchableOpacity
style={{
flex: 1,
flexDirection: 'row',
alignItems: 'center'
}}
onPress={this.show}
>
<Text
numberOfLines={1}
style={{ color: this.value ? '#ccc' : '#fff3' }}
>
{(
this.value ||
this.props.placeholder ||
''
).toUpperCase()}
</Text>
</TouchableOpacity>
<Modal
transparent
animationType='fade'
visible={this.visible}
onRequestClose={this.hide}
>
<View
style={{
flex: 1,
backgroundColor: '#0005',
alignItems: 'center',
paddingTop: 80
}}
>
<View
style={{
width: '80%',
backgroundColor: '#fff',
borderRadius: 5,
maxHeight: '80%',
overflow: 'hidden'
}}
>
<FlatList
data={data}
keyExtractor={i => i}
getItemLayout={(_, index) => {
const height = 40 + HairSpacer.width;
return {
length: height,
offset: height * index,
index
};
}}
ItemSeparatorComponent={HairSpacer}
renderItem={this.renderItem}
/>
</View>
<TouchableOpacity
onPress={this.hide}
style={{ marginTop: 12 }}
>
<Icon
name='ios-close-circle'
size={50}
color='#ccc'
/>
</TouchableOpacity>
</View>
</Modal>
</View>
);
}
}
export default Selector;
const contentStyle = {
flex: 1,
backgroundColor: '#0003',
paddingLeft: 10,
borderRadius: 3
};
7 Answers
Reset to default 6I fixed this issue by Defining a fixed height for the flatlist container.
For E.g
<View style={{height: 300}}>
{hasResults ? (
<FlatList
data={searchResults}
renderItem={renderItem}
keyExtractor={(item): string => {
return item.id;
}}
showsVerticalScrollIndicator={false}
/>
) : undefined}
</View>
According to official react native docs scrollview should have a bounded height to work. I think same applies to flatlist.
https://reactnative.dev/docs/scrollview
Keep in mind that ScrollViews must have a bounded height in order to work, since they contain unbounded-height children into a bounded container (via a scroll interaction). In order to bound the height of a ScrollView, either set the height of the view directly (discouraged) or make sure all parent views have bounded height. Forgetting to transfer {flex: 1} down the view stack can lead to errors here, which the element inspector makes quick to debug.
The only thing that worked for me was wrapping the inner items inside of the FlatList inside of Pressable
Make sure you have added the Flatlist in ScrollView and add keyboardShouldPersistTaps='always'
<ScrollView style={{ flex: 1 }} keyboardShouldPersistTaps='always'>
<FlatList
.................
/>
</ScrollView>
Just add keyboardShouldPersistTaps='always' to FlatList
Instead of TouchableOpacity use TouchableWithoutFeedback. It worked for me. Sample is below.
<TouchableWithoutFeedback onPress={onClose} activeOpacity={1} style={styles.modalBackground}></TouchableWithoutFeedback>
Add every renderItem ponent inside TouchableOpacity and use activeOpacity={1} to disable opacity change on press
renderItem={({ item }) =>
<TouchableOpacity activeOpacity={1}>
<Item>
<TouchableOpacity>
I solve with ScrollView, like this:
<ScrollView>
<FlatList
data={this.state.dataSource}
renderItem={({ item, index }) => (
<CountryItem item={item} index={index}/>
)}
horizontal={false}
onEndThreshold={0}
keyExtractor={item => ''.concat(Math.random())}/>
</ScrollView>
or use ListView.
本文标签： javascriptReactNative Flatlist in Modal unable to scrollStack Overflow
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