How to use TouchableOpacity to hide view by in React Native? - react-native

Question

I'm really new to React Native and I'm wondering how can I hide/show View
Here's my test code:
class Counter extends React.Component{
state = { count:0 };
setCount = () => this.setState(
prevState => ({ ...prevState, count: this.state.count + 1 })
)
render(){
const { count } = this.state;
const [valueLocation, onChangeText] = React.useState('Pleas input Address');
const [value, onChangeEvent] = React.useState('Your questions');
return (
<ScrollView style={styles.header}>
<View style={styles.box1}>
<View style={styles.box2}>
<View style={styles.user}>
<Image
style={styles.userImg}
source={{
uri: event.user[0].image,
}}
/>
<View style={styles.userText}>
<Text style={styles.username}>{event.user[0].name}</Text>
<Text style={styles.date}>{event.user[0].date}</Text>
</View>
</View>
<View style={styles.boxHidebtn}>
<View style={styles.EventClass}>
<Text style={styles.btn_text_white}>類型</Text>
</View>
<TouchableOpacity
style={styles.EventOpen}
onPress={this.setCount}
>
<Text>></Text>
</TouchableOpacity>
</View>
</View>
<View style={count % 2 ? styles.box3 : styles.box3Open}>
<Text style={styles.address}>台北市市民大道六段37號</Text>
<Text style={styles.eventShow}>路上坑洞造成積水</Text>
</View>
</View>
</ScrollView>
);
}
}
const App = () => {
<Counter/>
};
const styles = StyleSheet.create({
....
});
export default App;
I run my code and it tell me
"App(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.
thanks!!!!!!!!

Answer 1

It looks like your arrow function needs to return the Counter:
const App = () => {
return <Counter/>;
};
Or, simply:
const App = () => <Counter/>;

Answer 2

I can see three errors in your code:
const App = () => {
return <Counter/>; // here you should return Counter
};
prevState -> this.state I guess
setCount = () => this.setState({ ...this.state, count: this.state.count + 1 }); // here
you have also a syntax error <Text>></Text> remove this extra closing > inside touchableopacity
Regarding your question in the title? I can't see where you want to hide the view?