---
title: NSEvent.ModifierFlags
framework: appkit
role: symbol
role_heading: Structure
path: appkit/nsevent/modifierflags-swift.struct
---

# NSEvent.ModifierFlags

Flags that represent key states in an event object.

## Declaration

```swift
struct ModifierFlags
```

## Topics

### Event Modifier Flags

- [capsLock](appkit/nsevent/modifierflags-swift.struct/capslock.md)
- [shift](appkit/nsevent/modifierflags-swift.struct/shift.md)
- [control](appkit/nsevent/modifierflags-swift.struct/control.md)
- [option](appkit/nsevent/modifierflags-swift.struct/option.md)
- [command](appkit/nsevent/modifierflags-swift.struct/command.md)
- [numericPad](appkit/nsevent/modifierflags-swift.struct/numericpad.md)
- [help](appkit/nsevent/modifierflags-swift.struct/help.md)
- [function](appkit/nsevent/modifierflags-swift.struct/function.md)
- [deviceIndependentFlagsMask](appkit/nsevent/modifierflags-swift.struct/deviceindependentflagsmask.md)

### Deprecated

- [init(rawValue:)](appkit/nsevent/modifierflags-swift.struct/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [ExpressibleByArrayLiteral](swift/expressiblebyarrayliteral.md)
- [OptionSet](swift/optionset.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [SetAlgebra](swift/setalgebra.md)

## See Also

### Constants

- [NSEvent.EventTypeMask](appkit/nsevent/eventtypemask.md)
- [NSEvent.ButtonMask](appkit/nsevent/buttonmask-swift.struct.md)
- [NSEvent.Phase](appkit/nsevent/phase-swift.struct.md)
- [NSEvent.SwipeTrackingOptions](appkit/nsevent/swipetrackingoptions.md)
- [init(type:)](appkit/nsevent/eventtypemask/init(type:).md)