完整的 PDF SDK 与转换库，适用于任何 iOS 应用

                // Initialize a CPDFDocument object with the path to the PDF file
              

                let document: CPDFDocument? = CPDFDocument.init(url: filePath)
              

                // Initialize a CPDFView object with the size of the entire screen
              

                let pdfView: CPDFView? = CPDFView.init(frame: self.view.bounds) 
              

                pdfView?.document = document