---
title: kCGImagePropertyPNGDictionary
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagepropertypngdictionary
---

# kCGImagePropertyPNGDictionary

A dictionary of key-value pairs for an image that uses Portable Network Graphics (PNG) format.

## Declaration

```swift
let kCGImagePropertyPNGDictionary: CFString
```

## Discussion

Discussion For more information about the available metadata keys, see PNG Image Properties.