The Leading iOS PDF SDK

let pdfPath: String? = Bundle.main.path(forResource: "tiger", ofType: "pdf")
    
let docToOpen = PTPDFDoc(filepath: pdfPath)

let pdfViewCtrl = PTPDFViewCtrl()
pdfViewCtrl.setDoc(docToOpen)
self.view.addSubview(pdfViewCtrl)

// Set the size of the PDFViewCtrl to that of its superview.
// (Auto Layout is fully supported as well)
pdfViewCtrl.frame = self.view.bounds
pdfViewCtrl.autoresizingMask = [.flexibleWidth, .flexibleHeight]

NSString* pdfPath = [[NSBundle mainBundle] pathForResource:@"tiger" ofType:@"pdf"];
    
PTPDFDoc* docToOpen = [[PTPDFDoc alloc] initWithFilepath:pdfPath];

PTPDFViewCtrl* pdfViewCtrl = [[PTPDFViewCtrl alloc] init];
[pdfViewCtrl SetDoc:docToOpen];
[self.view addSubview:pdfViewCtrl];
  
// Set the size of the PDFViewCtrl to that of its superview.
// (Auto Layout is fully supported as well)
pdfViewCtrl.frame = self.view.bounds;
pdfViewCtrl.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;