I'm having some trouble with a
react-native
StackNavigator
App.js
export default SimpleApp = StackNavigator({
Home: { screen: HomeScreen },
Categories: { screen: CategoriesScreen }, // send from here
Category: { screen: CategoryScreen } // to here
});
TouchableHighlight
onPress
Categories.js
<TouchableHighlight onPress={(id) => {
const { navigate } = this.props.navigation;
navigate('Category', { category: id });
}}>
<Text>{name}</Text>
</TouchableHighlight>
category
props
Category
this.props.category
this.props.navigation.state.category;
this.props.navigation.state.params.category
navigate
navigate('Category', { category: id });
data
API
for (var i = 0; i < data.length; i++) {
var name = data[i].name;
var id = data[i].id;
categoryComponents.push(
<Card key={id}>
<CardItem>
<Body>
<TouchableHighlight onPress={(id) => {
const { navigate } = this.props.navigation;
navigate('Category', { params: { category: id } });
}}>
<Text>{name + " " + id}</Text>
</TouchableHighlight>
</Body>
</CardItem>
</Card>
);
}
Your problem isn't sending the parameter. You are sending it right and reading it right. Your error is related to that your id
is undefined.
You should fix your code like below,
for (var i = 0; i < data.length; i++) {
var name = data[i].name;
var id = data[i].id;
categoryComponents.push(
<Card key={id}>
<CardItem>
<Body>
<TouchableHighlight onPress={(event) => {
// onPress event fires with an event object
const { navigate } = this.props.navigation;
navigate('Category', { category: id });
}}>
<Text>{name + " " + id}</Text>
</TouchableHighlight>
</Body>
</CardItem>
</Card>
);
}
And you can read your parameter like below.
this.props.navigation.state.params.category