Tencent Music Tech Team

Sep 15, 2023 · Mobile Development

Parsing and Using NinePatch PNG Images for Resizable UI Elements

The article explains how to create, parse, and use NinePatch (.9.png) images by extracting the custom “npTc” chunk from a PNG file, building a PNGNinePatch object in Objective‑C, and converting its stretchable region data into UIEdgeInsets for resizable iOS UI elements.