CODEWITHSUNDEEP
androidreact-nativereact-navigation
Code Guru
Code Guru

Reputation: 15598

TypeError: undefined is not an object (evaluating this.props.navigation.navigate) in react native

I have just started with React Native. Here is the code

app.js

import React, { Component } from 'react';

import { StackNavigator } from 'react-navigation';

import Splash from "./screens/splash";
import Home from "./screens/home";
import Card from "./screens/card";

export const RootNavigator = StackNavigator({
  Home: {
    screen: Home,
    navigationOptions: {
      header: null,
    },
  },
  Profile: {
    screen: Profile,
    navigationOptions: {
      headerTitle: 'Profile',
    },
  },
  Card: {
    screen: Card,
    navigationOptions: {
      header: null,
    },
  },
});

export default class App extends Component {

  constructor(props) {
    super(props);

    this.state = { showSplash: true };

    // after 1200ms change showSplash property for spalsh screen
    setTimeout(() => {
      this.setState(previousState => {
        return { showSplash: false };
      });
    }, 1200);
  }

  render() {
    if (this.state.showSplash) {
      return (<Splash />);
    } else {
      return (<RootNavigator />);
    }
  }
}

In the home.js I am using card component directly like this

<ScrollView>
{
  this.state.cards.map((data, index) => {
    return (
      <Card key={data.id} cardData={data} />
    );
  })
}

and here is the card.js

import React, { Component } from 'react';
import { Button, View, Text, Image } from 'react-native';

export default class Card extends Component {
    constructor(props) {
        super(props);
    }
    render() {
        const { navigate } = this.props.navigation;
        return (
            <View>
                <View style={{ flex: 0.30 }}>
                    <Image source={{ uri: this.props.cardData.imgUrl }} style={{ height: 100 }} />
                </View>
                <View style={{ flex: 0.70, backgroundColor: 'steelblue' }}>
                    <Text >{this.props.cardData.name}</Text>
                    <Text >{this.props.cardData.imgUrl}</Text>
                    <Button
                        onPress={() => this.props.navigation.navigate('Profile', {})}
                        title="Profile"
                    />
                </View>
            </View>
        );
    }
}

Now if I use 

const { navigate } = this.props.navigation;

in the profile.js it works but in case of card.js it is showing 

TypeError : undefined is not an object (evaluating 'this.props.navigation.navigate')

This question is asked many times and tried all the solutions provided by the answers, but none of the answers helped.

What could be this possible issue? Is this because I am using <Card> in the Home component

Upvotes: 1

Views: 8272

Answers (1)

magneticz
magneticz

Reputation: 2440

If I understood correctly, Card component in your home.js screen is component in card.js.

Because you are using Card component directly in home.js (not navigating to it with react-navigation), navigation prop is not being injected. If you want your current code to work, you should pass navigation prop to your card component from profile.js

const { navigation } = this.props;
...
<ScrollView>
{
  this.state.cards.map((data, index) => {
    return (
      <Card navigation={navigation} key={data.id} cardData={data} />
    );
  })
}
</ScrollView>

Most probably, you are opening your profile.js screen with this.props.navigation.navigate('Profile'), so it is working fine there.

Upvotes: 3

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