---
title: MKAnnotationCalloutInfoDidChange
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/nsnotification/name-swift.struct/mkannotationcalloutinfodidchange
---

# MKAnnotationCalloutInfoDidChange

A property to observe to determine when the title or subtitle information of an annotation object changes.

## Declaration

```swift
static let MKAnnotationCalloutInfoDidChange: NSNotification.Name
```

## Discussion

Discussion This notification supports legacy applications and is no longer necessary. MapKit tracks changes to the title and subtitle of an annotation using KVO notifications.