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  "title" : "NSFontCollection.DidChangeMessage"
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# NSFontCollection.DidChangeMessage

```
struct DidChangeMessage
```

## Topics

### Initializers

[`init(fontCollection: NSFontCollection, action: NSFontCollection.ActionTypeKey, collectionName: String?, oldName: String?, visibility: NSFontCollection.Visibility?)`](/documentation/AppKit/NSFontCollection/DidChangeMessage/init(fontCollection:action:collectionName:oldName:visibility:))

### Instance Properties

[`var action: NSFontCollection.ActionTypeKey`](/documentation/AppKit/NSFontCollection/DidChangeMessage/action)

[`var collectionName: String?`](/documentation/AppKit/NSFontCollection/DidChangeMessage/collectionName)

[`var fontCollection: NSFontCollection`](/documentation/AppKit/NSFontCollection/DidChangeMessage/fontCollection)

[`var oldName: String?`](/documentation/AppKit/NSFontCollection/DidChangeMessage/oldName)

[`var visibility: NSFontCollection.Visibility?`](/documentation/AppKit/NSFontCollection/DidChangeMessage/visibility)

## Relationships

### Conforms To

[`MainActorMessage`](/documentation/Foundation/NotificationCenter/MainActorMessage)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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