# Catalog

{% tabs %}
{% tab title="iOS" %}

```swift
let query = CatalogQuery()
Traveler.fetchCatalog(query: query) { (catalog, error) in 

}
```

Alternatively you can use the delegate pattern

```swift
Traveler.fetchCatalog(query: query, delegate: self)
```

```swift
extension MyViewController: CatalogFetchDelegate {
    func catalogFetchDidSucceedWith(_ result: Catalog) {
    
    }
    
    func catalogFetchDidFailWith(_ error: Error) {
    
    }
}
```

The UI SDK ships with a view controller which you can use (and/or subclass) to display the catalog. If you wish you can also use them via storyboards, just remember to pass along the `Catalog` instance.

```swift
let catalogResultVC = CatalogResultViewController()
catalogResultVC.catalog = catalog
present(catalogResultVC, animated: true)
```

Should you require further customization, the UI SDK ships with a `CatalogView` that provides the basics of displaying two dimensional data.
{% endtab %}

{% tab title="Android" %}

```java
CatalogQuery query = new CatalogQuery();
Traveler.fetchCatalog(query, new CatalogSearchCallback() {
    @Override
    public void onCatalogSearchSuccess(Catalog catalog) {
    
    }
    
    @Override
    public void onCatalogSearchError(Error error) {
    
    }
});
```

The UI SDK ships with a fragment to handle the display of the fetched Catalog. To include this fragment add a `<FrameLayout>` to your Activity's layout XML:

```markup
    <FrameLayout
            android:id="@+id/catalogContainer"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
```

And in your Activity's `onCreate()` the `CatalogFragment`

```java
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
        
    CatalogFragment catalogFragment = CatalogFragment.newInstance(catalog);
        
    FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
    transaction.replace(R.id.catalogContainer, catalogFragment);
    
    transaction.commit();    
}
```

{% endtab %}
{% endtabs %}


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