> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/ios/guides/getting-started/showing-a-pdf.md).

# Quick start - view a document on iOS

Learn how to display a PDF using Apryse SDK. Import PDFNet and Tools, create a document viewer, set the document, and present it on screen. Get started now! The Apryse iOS SDK streamlines secure docum

This guide demonstrates how to display a PDF. To begin working with Apryse SDK, you must have first [added it to your project](/ios/get-started/get-started.md).

1. Apryse must be initialized before using any Apryse classes. This only needs to be done once. This is done as shown:

{% hint style="info" %}
**No trial license key required.**

The trial of Apryse Mobile SDK does not require a trial key. A commercial license key is required for use in a production environment. Please [contact sales](https://apryse.com/form/contact-sales) to purchase a commercial key or if you need any other license key assistance.
{% endhint %}

{% hint style="warning" %}
**Keep your license keys confidential.**

License keys are uniquely generated. Please make sure that it is not publicly available (e.g. in your public GitHub).
{% endhint %}

{% tabs %}
{% tab title="Swift" %}
{% code lineNumbers="true" %}

```swift
PTPDFNet.initialize("<key-goes-here>")
```

{% endcode %}
{% endtab %}

{% tab title="Obj-C" %}
{% code lineNumbers="true" %}

```objc
[PTPDFNet Initialize:@"<key-goes-here>"];
```

{% endcode %}
{% endtab %}
{% endtabs %}

1. At the top of your source file, import PDFNet and Tools.

{% tabs %}
{% tab title="Swift" %}
{% code lineNumbers="true" %}

```swift
import PDFNet
import Tools
```

{% endcode %}
{% endtab %}

{% tab title="Obj-C" %}
{% code lineNumbers="true" %}

```objc
#import <PDFNet/PDFNet.h>
#import <Tools/Tools.h>
```

{% endcode %}
{% endtab %}
{% endtabs %}

1. The following shows how to create a document viewer, set the document to display, and present it on screen.

{% tabs %}
{% tab title="Swift" %}
{% code lineNumbers="true" %}

```swift
// Create a PTDocumentController
let documentController = PTDocumentController()

// The PTDocumentController must be in a navigation controller before a document can be opened
let navigationController = UINavigationController(rootViewController: documentController)

// Open an existing local file URL.
let fileURL: URL! = Bundle.main.url(forResource: "sample", withExtension: "pdf")

documentController.openDocument(with: fileURL)

// Show navigation (and document) controller.
self.present(navigationController, animated: true, completion: nil)
```

{% endcode %}
{% endtab %}

{% tab title="Obj-C" %}
{% code lineNumbers="true" %}

```objc
// Create a PTDocumentController
PTDocumentController *documentController = [[PTDocumentController alloc] init];

// The PTDocumentController must be in a navigation controller before a document can be opened
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:documentController];

// Open an existing local file URL.
NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"Sample" withExtension:@"pdf"];

[documentController openDocumentWithURL:fileURL];

// Show navigation (and document) controller.
[self presentViewController:navigationController animated:YES completion:nil];
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

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```
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