Detect touch position in array of view (REACT NATIVE) - react-native

I am creating a planning application in react native and i couldn't handle the creation of a new view above a list of rendered views
I want to detect a user touch in map of views and show a view in the touch position, I tried to use
<TouchableOpacity onPress={(evt)=>{this.setTopNewViewPostion(evt.nativeEvent.locationY}}
but this was rendering the view for all slots that mean it is duplicated every time
Thanks
handleClick (){ this.setState({newSlotVisible: true});} renderSlotsOfTab(tab, i){
const ViewFlex = [1, 2, 3, 4];
return (
<TouchableOpacity
onStartShouldSetResponder={() => true}
onMoveShouldSetResponder={() => true}
onResponderMove={()=>this.hideNewSlot()}
ref={(ref) => i}
tabLabel={tab}
key={i}
activeOpacity={1}
>
{
ViewFlex.map((b , i)=>
{
return(
<TouchableOpacity
ref={i}
removeClippedSubviews
style={[styles.oneSlotView ,
{ flex: b }]}
key={i}
/** here get the touch position**/
onPress={this.handleClick.bind(this, i)}
>
<View
style={ styles.hoursIndicatorView}
>
<Text style={styles.textIndicatorTime}>00h00</Text>
</View>
</TouchableOpacity>)
}
)}
{this.state.newSlotVisible?
//the new view to render is this one
this.renderNewView();
:null}
</TouchableOpacity>
);
}

Related

React native list map() method add custom element below selected Item

When Item with id=1 selected
then the element appear below
the selected Item. And when
unselected the element disappear.
This is a list with map() method.
The element should be inside the
SrollView like Item
But isn’t a new Item
I have this code that can create a new Item below the selected Item but I don't want to create a new Item but only appear a custom View(element) like above.
Expo Snack> https://snack.expo.dev/#stefanosalexandrou/honest-cashew
You could store the selected index in a state, which you are already doing. Then, use conditional rendering in order to render a custom component below the selected item. Furthermore, if a selected item is pressed again, set the state to undefined.
The handleOnPress function.
function handleOnPress(idx) {
setSelectedId(prev => prev === idx ? undefined : idx)
}
The updated render function.
<View style={styles.container}>
<ScrollView>
<View>
{data.map((person, index) => {
const backgroundColor = index === selectedId ? "#6e3b6e" : "#f9c2ff";
return (
<View>
<TouchableOpacity
onPress={() => handleOnPress(index)}
style={{
padding:20,
backgroundColor: backgroundColor,
marginBottom:20,
}}
>
<Text>{person.name}</Text>
</TouchableOpacity>
{
index === selectedId ? <View style={{backgroundColor: "red", height: 100, width: "100%"}}><Text>Custom Super Component Visible on press of above item </Text></View> : null
}
</View>
);
})}
</View>
</ScrollView>
</View>
I have added a dummy component if the index is selected.
However, you might want to select multiple items one after the other and deselect them individually while having the same effect. For doing so, we change the state to store an array of indices instead.
The updated state and handleOnPress function.
const [selectedIndices, setSelectedIds] = useState([]);
function handleOnPress(idx) {
if (selectedIndices.includes(idx)) {
setSelectedIds(prev => prev.filter(i => i !== idx))
} else {
setSelectedIds(prev => [...prev, idx])
}
}
The updated render function.
return (
<View style={styles.container}>
<ScrollView>
<View>
{data.map((person, index) => {
const backgroundColor = selectedIndices.includes(index) ? "#6e3b6e" : "#f9c2ff";
return (
<View>
<TouchableOpacity
onPress={() => handleOnPress(index)}
style={{
padding:20,
backgroundColor: backgroundColor,
marginBottom:20,
}}
>
<Text>{person.name}</Text>
</TouchableOpacity>
{
selectedIndices.includes(index) ? <View style={{backgroundColor: "red", height: 100, width: "100%"}}><Text>Custom Super Component Visible on press of above item </Text></View> : null
}
</View>
);
})}
</View>
</ScrollView>
</View>
);

How can I link the button outside flatlit to hide and show the items inside the flatlist in each section react native

I am using flatlist in my app to show the result of the game by using API, I have a button outside the flatlist, I want the user to click the button and by clicking the button toggle switch will appear with each game and a user can switch off to hide the games and switch on to show the games.
First problem how can I link the button with the render function of flatlist to show the toggle switch.
Seconde is that how can I use the toggle switch to show and hide the games in flatlist.
<View style={{flex:1,}}>
<TouchableOpacity onPress={this.renderItem }> // What should I do here?
<Text style={{fontSize:30,color:'blue'}}>show/hide</Text>
</TouchableOpacity>
<DraggableFlatList
data={this.state.dataSource}
onDragEnd={this.dataSource}
renderItem={this.renderItem}
keyExtractor={item => item.GameId.toString()}
ItemSeparatorComponent={this.renderSeprator}
refreshing = {this.state.refreshing}
onRefresh = {this.handleRefresh}
/>
renderItem=({item,navigation,drag,btnvalue1})=>{
const current = new Date();
const currentHour = current.getHours();
return(
<ScaleDecorator>
<TouchableOpacity style={styles.item}
onLongPress={drag}
onPress={
() => this.props.navigation.navigate('ResultsStack',
{ screen: 'Result', params: { resultDate: this.state.resultDate ,GameId: item.GameId } }
//() => this.props.navigation.navigate('ResultsStack', { screen: 'Result' }
)} >
<Image style={styles.img}
source={{
uri: item.ImgUrl,
}}
/>
<Text style={styles.title}>{item.GameDescp} [{item.DrawRef}] [{item.DayName?.slice(0, 3)}]</Text>
<Text style={styles.txt3}>{item.Result03}</Text>
**//On click I want to hide this Ionicon and show a toggle switch**
<Ionicons
name="chevron-forward-outline"
style={styles.iconarrow}
//color={color}
size={30}
></Ionicons>
{this.btnvalue1 === 1 ? (
<Switch
style={styles.iconarrow}
trackColor={{ false: "#767577", true: "#81b0ff" }}
ios_backgroundColor="#3e3e3e"
/>) : null}
</TouchableOpacity>
</ScaleDecorator>

Double tap on a Flatlist React Native

I'm trying to recreate Instagram's double tap on an item and a heart appears for a few seconds. Im currently rendering text items in a flatist (1 item per page) and I want the user to be able to double tap the text section and a heart will appear.
I can't seem to get both the flatList and the animation to work together. Any ideas? In my current code it will only render the flatList and not the Animated.image. I tried wrapping the animated image in an oppress in a touchable without feedback, still no luck
const onDoubleTap = useCallback(() => {
//console.log("tapped");
scale.value = withSpring(1, undefined, (isFinished) => {
if (isFinished) {
scale.value = withDelay(500, withSpring(0));
console.log("Double Tapped");
}
});
}, []);
return (
<TapGestureHandler
numberOfTaps={2}
onActivated={onDoubleTap}
>
<Animated.View>
<FlatList
horizontal={false}
decelerationRate={"fast"}
snapToAlignment={"center"}
snapToInterval={Dimensions.get("screen").height}
data={flatl}
// keyExtractor={(item, index) => `id_${index}`}
style={styles.fullScreen}
renderItem={({ item }) => (
<View style={[{ ...styles.fullHeight }]}>
<Text>{item.name}</Text>
</View>
)}
/>
<AnimatedImage
source={require("../assets/heart.png")}
style={[
styles.image,
rStyle,
]}
resizeMode={"center"}
/>
</Animated.View>
</TapGestureHandler>
);
}

How do I flex horizontally within a column layout? Currently only half the width of the screen

How do I flex horizontally within a column layout? Currently only half the width of the screen
Here's the current render code:
render() {
const {handle_data} = this.state
if (handle_data.length) {
return (
<ScrollView style={styles.container}>
{
handle_data.map(pack => {
console.log('this.cleanDataForFlatlist(pack): ', this.cleanDataForFlatlist(pack))
return (
<View style={styles.pack}>
<Text style={{fontWeight: 'bold'},{fontSize: 24}}>{pack[0].pack_name}</Text>
<Text style={{fontWeight: 'bold'},{fontSize: 16}}>{pack[0].pack_description}</Text>
<View style={styles.pack}>
<FlatList
data={this.cleanDataForFlatlist(pack)}
keyExtractor={this._keyExtractor}
renderItem={this._renderHandle}
/>
</View>
</View>
)
})
}
</ScrollView>
);
} else {
return null
}
}
Here's what it looks like now
I do not see your code about an item, so I show an example code. your problem is mainly the item render.
// the soruceData is the data souce,in other words, your handle_data
<View style={{flex:1, backgroundColor:'transparent'}} >
<FlatList
data={this.state.sourceData}
renderItem={this._renderItem}
/>
</View>
//the render item method, I suggest you put the item into a pure component
_renderItem = ({ item }) => {
return (
<View style={{flexDirection:'column',width:'92%'}>
id={item.id} // the every item should hava a unique id or key
<ImageView source={{uri:"image url"}} style={{width:,height:}}/>
<Text numberOfLines={1} style={{fontSize: 18,
color: '#353535',}}>"content"</Text>
/>
);
};
you set layout width or height should use flex or percent. in this case, your UI is flexible.
At the same time, I suggest you read felx layout guide
In the end, I suggest you remove the scroll view, move views which algin above the flatList into the flatList ListHeaderComponent. it can avoid the scroll conflict.

How can I use tabs in a modal in react-native

I have modal for filtering search resluts , something like foursquare app . I have filters in diffrent categories and I need to use tabs for each category . for example when user clicks each tabs it shows the filters related to that tab . and user can select checkboxes or radio buttons . and at the end when user checks all of their needed filters I need to make http request with the new filters.
Something like the image below . I created the modal but I need the functionality for tabs and at the end making the api request with the selected options:
You can also create custom tabs using <Text> with state and depending on a state value render a View associated with that tab. for example
state = {
modalVisible: false,
currentTab: 1,
};
onTabClick = (currentTab) => {
this.setState({
currentTab: currentTab,
});
};
// inside render
<Modal
animationType="slide"
transparent={true}
visible={this.state.modalVisible}
onRequestClose={() => {
Alert.alert('Modal has been closed.');
}}>
<View style={styles.tabs}>
<Text
onPress={() => {
this.onTabClick(1);
}}
style={[
styles.tabTextStyle,
this.state.currentTab === 1 ? styles.tabUnderline : null,
]}>
GENDER
</Text>
...
</View>
{this.state.currentTab === 1 && (
<View>
<Text>GENDER</Text>
</View>
)}
...
snack example
Modal is just a Container like View. You can draw anything inside it.
First, import {Modal} from 'react-native'
Then, in your modal, embed anything what you want:
<Modal visible={ this.state.modal }
animationType="fade" transparent={true}
onRequestClose={_ => this.setState({ modal: false }) }>
<View>
{/*
Do anything. Its an open ground.
Whatever component, styles, props and/or anything else you want, you can design
*/}
{/* For example, I am adding a close button */}
<TouchableOpacity style={{ alignSelf: 'flex-end' }} onPress={_ => this.setState({ modal: false }) }>
<Icon type="FontAwesome" name='times' style={ styles.closeIcon } />
</TouchableOpacity>
</View>
</Modal>
And you can open your modal from anywhere like:
<TouchableOpacity style={ styles.button } onPress={_ => this.setState({ modal: true }) }>
<Text style={ styles.buttonText }>Open Modal</Text>
</TouchableOpacity>
Finally, for tabs, you can use either of:
NativeBase Tab Component
React Native Tab View