How to convert a PDF to a PNG in IOS programmatically

Question

I am developing an iPhone application to display large image(s) and PDF(s). The PDF and images are available for web downloading or through iTunes importing.

I am using a tiling approach where after the download/import a set of PNG/JPEG tiles are programmatically generated and saved to the iPhone.

Looking previous questions I found a way to do tiling for large images, but it does not work with PDF files?

I wonder if it is possible to convert the PDF file into a PNG/JPEG before running the tiling routine, or if there are better approaches to do this.

Answer 1

您可以创建图像对象，为图像创建图形上下文，在图像的图形上下文中呈现PDF页面，然后保存图像。