I'm having trouble retrieving data from a nested object in React Native for iOS

Question

I'm having trouble retrieving data from a nested object in React Native for iOS

Currently, I am diving into learning React Native specifically for iOS development.

One issue that I am encountering is the inability to access information within an object, specifically a link to an image.

Inside the renderRow function for listView in React Native, my code looks like this:

renderRow(rowData, sectionID, rowID) { 
 console.log(rowData.media.imagenes[0].imagenLink)

When executed, it displays as shown below:

Picture of console.log(rowData.media)

Despite the expected functionality, writing the code in the following format results in an error:

console.log(rowData.media.imagenes[0].imagenLink)

Error from Simulator

Interestingly, when the code is placed outside of the renderRow() function, it works perfectly fine:

console.log(this.state.datosJSON[0].media.imagenes[0].imagenLink)

This allows me to successfully retrieve the link to the picture.

If anyone could provide assistance, it would be greatly appreciated. Thank you for your time and consideration.

javascript ios json listview react-native

Answer 1

Answer №1

I'm not exactly sure how it's done, but the renderRow method is typically used as shown below. First, you need to define the dataSource in the state.

getInitialState: function() {
    var ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
    return {
      dataSource: ds.cloneWithRows(['row 1', 'row 2']),
    };
  },

Next, you should incorporate the ListView in your render method.

  render: function() {
    return (
      <View>
        <ListView
          dataSource={this.state.dataSource}
          renderRow={this._renderRow}
        />
      </View>
    );
  },

And once you've set all of that up, you can implement the renderRow method like this.

renderRow(rowData, sectionID, rowID) { 
 console.log(rowData.media.imagenes[0].imagenLink);
}

If you follow these steps, your code should work correctly.

Answer 2

I'm not exactly sure how it's done, but the renderRow method is typically used as shown below. First, you need to define the dataSource in the state.

getInitialState: function() {
    var ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
    return {
      dataSource: ds.cloneWithRows(['row 1', 'row 2']),
    };
  },

Next, you should incorporate the ListView in your render method.

  render: function() {
    return (
      <View>
        <ListView
          dataSource={this.state.dataSource}
          renderRow={this._renderRow}
        />
      </View>
    );
  },

And once you've set all of that up, you can implement the renderRow method like this.

renderRow(rowData, sectionID, rowID) { 
 console.log(rowData.media.imagenes[0].imagenLink);
}

If you follow these steps, your code should work correctly.

I'm having trouble retrieving data from a nested object in React Native for iOS

Answer №1

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