---
title: "iOS PDF viewer events and notifications | Nutrient SDK"
canonical_url: "https://www.nutrient.io/guides/ios/events-and-notifications/"
md_url: "https://www.nutrient.io/guides/ios/events-and-notifications.md"
last_updated: "2026-05-15T15:53:41.597Z"
description: "Discover how to leverage events and notifications in iOS development. Maximize user engagement with powerful techniques. Unlock the secrets now!"
---

# Events and notifications

Listen for events and notifications to trigger workflows and automations or to customize behavior.

## Key capabilities

- **Annotations** — Listen for changes originating from the UI or server

- **Forms** — Trigger actions in sync with form field inputs

- **Text selection** — Retrieve text or subscribe to change events

- **Events** — Hook into events that dispatch whenever an action occurs

- **Analytics** — Collect data based on user activity

## Guides for events and notifications

**[Annotation events](https://www.nutrient.io/guides/ios/events-and-notifications/annotation.md)**\
Learn about the events dispatched for annotation changes

**[Form events](https://www.nutrient.io/guides/ios/events-and-notifications/forms.md)**\
How to detect user input in form fields

**[Text selection events](https://www.nutrient.io/guides/ios/events-and-notifications/text-selection.md)**\
How to retrieve selected text and text located within a selection range

**[Analytics](https://www.nutrient.io/guides/ios/features/analytics.md)**\
How to collect usage data based on a user’s activity

**[Analytics events](https://www.nutrient.io/guides/ios/events-and-notifications/events.md)**\
Learn about the analytics events that are dispatched when actions occur

**Call to Action**

Start your free trial for unlimited access and expert support.

[Learn More](https://www.nutrient.io/sdk/ios/getting-started.md)
---

## Related pages

- [Analytics](/guides/ios/features/analytics.md)
- [iOS PDF form updates and notifications guide](/guides/ios/events-and-notifications/forms.md)
- [iOS PDF annotation events and notifications](/guides/ios/events-and-notifications/annotation.md)
- [Analytics events](/guides/ios/events-and-notifications/events.md)
- [Text selection events and notifications](/guides/ios/events-and-notifications/text-selection.md)