React Native : expected dynamic type 'string' but had type 'object'

Question

I want my app to calculate dates. To do so, i input 3 dates and with a button, it should print them in an alert. When testing, i seem to have a bug. My button is :

 <TouchableOpacity onPress={() => {{Alert.alert("Box", <calculator date {this.state.dateInit} />)}}}>
    <View style={styles.button}>
        <Text style={styles.buttonText}>Calculer</Text>
    </View>
</TouchableOpacity>

and calculator refers to

class calculator extends Component {
  render() {
    return (
        <Text>Le CQE Initial etait le {String(this.props.date)}</Text>
      );
  }
}

I tried with this.props.date.toString() and String(this.props.date) both in the alert and the class and i still get an error

TypeError: expected dynamic type string but had type object

while toString() or String(...) should have translated it as string.

Thx for the help !

Ritesh Bansal · Accepted Answer · 2017-07-18 08:09:33Z

1

You are passing a component in second argument of alert function

Alert.alert("Box", <calculator date {this.state.dateInit} />

but the second argument of alert should be string as described here

answered Jul 18, 2017 at 8:09

Ritesh Bansal

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1 Comment

General Baguettson Over a year ago

yes, it is indeed right. I'll try and use react-navigation instead. I still have to understand how function work in react native ^^. Thanks !

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