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# UNTimeIntervalNotificationTrigger

A trigger condition that causes the system to deliver a notification after the amount of time you specify elapses.

```
class UNTimeIntervalNotificationTrigger
```

## Overview

Create a [`UNTimeIntervalNotificationTrigger`](/documentation/UserNotifications/UNTimeIntervalNotificationTrigger) object when you want to schedule the delivery of a local notification after the number of seconds you specify elapses. You use this type of trigger to implement timers.

Listing 1 creates a trigger that delivers its notification one time after 30 minutes have elapsed.

Listing 1. Creating a trigger that fires in 30 minutes

```objc
// Fire in 30 minutes (60 seconds times 30)
UNTimeIntervalNotificationTrigger* trigger = [UNTimeIntervalNotificationTrigger
                     triggerWithTimeInterval:(30*60) repeats: NO];
```

## Topics

### Creating a Time Interval Trigger

[`init(timeInterval:repeats:)`](/documentation/UserNotifications/UNTimeIntervalNotificationTrigger/init(timeInterval:repeats:))

Creates a time interval trigger using the time value parameter.

### Getting the Trigger Information

[`nextTriggerDate()`](/documentation/UserNotifications/UNTimeIntervalNotificationTrigger/nextTriggerDate())

The next date at which the trigger conditions are met.

[`timeInterval`](/documentation/UserNotifications/UNTimeIntervalNotificationTrigger/timeInterval)

The time interval to create the trigger.


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