I'm trying to get data from an array and using map function to render content. Look at
**{this.lapsList()}**
and the associated
**lapsList()**
function to understand what I'm trying to do. The result is nothing is displaying (Views under view, etc.) Here is my simplified code:
class StopWatch extends Component {
constructor(props) {
super(props);
this.state = {
laps: []
};
}
render() {
return (
<View style={styles.container}>
<View style={styles.footer}>
<View><Text>coucou test</Text></View>
{this.lapsList()}
</View>
</View>
)
}
lapsList() {
this.state.laps.map((data) => {
return (
<View><Text>{data.time}</Text></View>
)
})
}
_handlePressLap() {
console.log("press lap");
if (!this.state.isRunning) {
this.setState({
laps: []
})
return
}
let laps = this.state.laps.concat([{'time': this.state.timeElapsed}]);
this.setState({
laps: laps
})
console.log(laps);
}
}
Don't forget to return the mapped array , like:
lapsList() {
return this.state.laps.map((data) => {
return (
<View><Text>{data.time}</Text></View>
)
})
}
Reference for the map() method: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
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