---
title: "MusicEventIteratorHasPreviousEvent(_:_:)"
framework: audiotoolbox
role: symbol
role_heading: Function
path: "audiotoolbox/musiceventiteratorhaspreviousevent(_:_:)"
---

# MusicEventIteratorHasPreviousEvent(_:_:)

Indicates whether or not a music track contains an event before the music event iterator’s current position.

## Declaration

```swift
func MusicEventIteratorHasPreviousEvent(_ inIterator: MusicEventIterator, _ outHasPrevEvent: UnsafeMutablePointer<DarwinBoolean>) -> OSStatus
```

## Parameters

- `inIterator`: The music event iterator whose state you want to know about.
- `outHasPrevEvent`: On output, true (nonzero) if there is an event closer to the start of the music track than the music event iterator’s current position; false (zero) otherwise.

## Return Value

Return Value A result code.

## See Also

### Iterating Over Music Events

- [NewMusicEventIterator(_:_:)](audiotoolbox/newmusiceventiterator(_:_:).md)
- [DisposeMusicEventIterator(_:)](audiotoolbox/disposemusiceventiterator(_:).md)
- [MusicEventIteratorNextEvent(_:)](audiotoolbox/musiceventiteratornextevent(_:).md)
- [MusicEventIteratorSeek(_:_:)](audiotoolbox/musiceventiteratorseek(_:_:).md)
- [MusicEventIteratorDeleteEvent(_:)](audiotoolbox/musiceventiteratordeleteevent(_:).md)
- [MusicEventIteratorGetEventInfo(_:_:_:_:_:)](audiotoolbox/musiceventiteratorgeteventinfo(_:_:_:_:_:).md)
- [MusicEventIteratorHasCurrentEvent(_:_:)](audiotoolbox/musiceventiteratorhascurrentevent(_:_:).md)
- [MusicEventIteratorHasNextEvent(_:_:)](audiotoolbox/musiceventiteratorhasnextevent(_:_:).md)
- [MusicEventIteratorPreviousEvent(_:)](audiotoolbox/musiceventiteratorpreviousevent(_:).md)
- [MusicEventIteratorSetEventInfo(_:_:_:)](audiotoolbox/musiceventiteratorseteventinfo(_:_:_:).md)
- [MusicEventIteratorSetEventTime(_:_:)](audiotoolbox/musiceventiteratorseteventtime(_:_:).md)
- [MusicEventIterator](audiotoolbox/musiceventiterator.md)
- [MusicEventType](audiotoolbox/musiceventtype.md)
- [ExtendedNoteOnEvent](audiotoolbox/extendednoteonevent.md)
- [ExtendedTempoEvent](audiotoolbox/extendedtempoevent.md)