---
title: "init(intervalStart:intervalEnd:repeats:warningTime:)"
framework: Device Activity
role: symbol
role_heading: Initializer
platforms: [iOS 15.0+, iPadOS 15.0+, Mac Catalyst 15.0+]
path: "deviceactivity/deviceactivityschedule/init(intervalstart:intervalend:repeats:warningtime:)"
---

# init(intervalStart:intervalEnd:repeats:warningTime:)

Creates a new schedule.

## Declaration

```swift
init(intervalStart: DateComponents, intervalEnd: DateComponents, repeats: Bool, warningTime: DateComponents? = nil)
```

## Parameters

- `intervalStart`: The date components that represent the start time for a schedule’s interval.
- `intervalEnd`: The date components that represent the end time for a schedule’s interval.
- `repeats`: Indicates whether the schedule recurs. If false, the extension stops receiving callbacks when the interval ends for the first time.
- `warningTime`: An optional warning time to receive callbacks. If the components specify a longer time interval than the schedule’s interval, the system clamps the warning callbacks for each event’s threshold to the start time of the interval.

## Discussion

Discussion important: If the current date falls in between intervalStart and intervalEnd, the system calls the intervalDidStart(for:) method immediately upon starting to monitor the activity. If the current date doesn’t fall in between intervalStart and intervalEnd, then intervalDidStart(for:) calls at the next date matching intervalStart.

## See Also

### Creating a Schedule

- [intervalEnd](deviceactivity/deviceactivityschedule/intervalend.md)
- [intervalStart](deviceactivity/deviceactivityschedule/intervalstart.md)
- [nextInterval](deviceactivity/deviceactivityschedule/nextinterval.md)
- [repeats](deviceactivity/deviceactivityschedule/repeats.md)
- [warningTime](deviceactivity/deviceactivityschedule/warningtime.md)