CGPDFDocumentCreateWithURL

CGPDFDocument is a class in the Core Graphics framework of Apple's iOS and macOS operating systems. It is designed to provide a way to interact with PDF documents within applications. This class allows developers to open, read, and manipulate PDF files programmatically. It supports a variety of operations, including rendering pages to a graphics context, extracting text and images, and querying the structure and metadata of the document.

One of the key features of CGPDFDocument is its ability to efficiently handle large PDF files. It uses a lazy loading mechanism, which means that it only loads the necessary parts of the document into memory as needed, rather than loading the entire file at once. This makes it suitable for use in applications with limited memory resources, such as mobile apps.

The class provides methods for accessing individual pages of a PDF document, as well as for querying the properties of those pages, such as their size and rotation. It also supports the extraction of text and images from the document, which can be useful for applications that need to process or display the content of PDF files.

In addition to these basic operations, CGPDFDocument also supports the extraction of annotations and bookmarks from the document. Annotations can be used to highlight or comment on specific parts of the document, while bookmarks provide a way to navigate to specific pages or sections.

Overall, CGPDFDocument is a powerful and flexible class for working with PDF documents in iOS and macOS applications. Its support for a wide range of operations and its efficient memory management make it a valuable tool for developers who need to integrate PDF functionality into their apps.