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VistasHow to select First item in FlatList as default one?
I'm trying to use Flatlist like Sidebar, but it intializes only after clicking on it, Is there any way by which I can make first flatlist item as default one. In other words onclick work should happen before page load like in lifecycleHooks Also suggest me If there is any way to create sidebar dynamically instead of using Flatlist
<FlatList
data={Object.keys(this.state.groups)}
renderItem ={({ item, index }) =>
(
<TouchableOpacity
onPress={() => { this.showDetails(item),this.setState({itemIndex:index}) }}
// onPress={() => alert(item)}
>
{console.log(index,"index of cards",Object.keys(this.state.groups),"item index")}
<View style={{width: 280, height:54 , flexDirection:"row",alignItems:"center",backgroundColor: (this.state.itemIndex === index) ? "#74C947" : "#F6F6F6"}}>
{/* Use ExcludeIcon.svg for stop symbol*/}
{(this.state.itemIndex === index) ?
<Image source={require("../../../assets/images/WhiteTick.svg")} style={{width:16,height:11,marginLeft:15,marginRight:9}}/>
:
<Image source={require("../../../assets/images/GreenTick.svg")} style={{width:16,height:11,marginLeft:15,marginRight:9}}/>
}
<Text style={{
fontStyle:"normal",
fontWeight:"500",
fontSize: 16,
color: (this.state.itemIndex === index) ? "#FFFFFF" : "#333333",
textTransform:"capitalize"
}}>
{item}
</Text>
</View>
</TouchableOpacity>
)
}
keyExtractor={item => item}
/>
·
Juan Pablo Isaza
2 Respuestas
Responde la pregunta0
Try this way
state = {
itemIndex: 0
};
componentDidMount(){
this.showDetails(this.state.itemIndex);
}
·
Juan Pablo Isaza
Denunciar
0
You can keep default value of itemIndex to 0 which selects the first element.
constructor(props) {
super(props);
this.state = {itemIndex : 0};
}
·
Juan Pablo Isaza
Denunciar
Responde la pregunta