How to make pdfView zoom=100% to fit screen size

Question

Created Jun ’20

Replies 1

Boosts 2

Views 4.5k

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So I have this pdfView and I wanna make it so its first display is a zoom of 100% of the page, but the problem is that what I have now is zooming in to much and the UI is not pretty to be like that. It just like zooms to much and I want it to be perfectly zoomed to fit the screen size.
I have tried and can't find a solution.

My code is this:

Code Block     let pdfView = PDFView()
		pdfView.translatesAutoresizingMaskIntoConstraints = false
		pdfView.autoScales = true
		pdfView.maxScaleFactor = 4.0
		pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit
		view.addSubview(pdfView)
		pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
		pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
		pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
		pdfView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
		
		
		guard let path = Bundle.main.url(forResource: materia , withExtension: "pdf") else { return }
		if let document = PDFDocument(url: path) {
				pdfView.document = document
		}

Boost

Answer 1

Wagnerian13 OP

Mar ’22

Hi there,

You have to put PDFView setters after setting PDFDocument and it will all should be working.

pdfView.translatesAutoresizingMaskIntoConstraints = false	
view.addSubview(pdfView)		

pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true		pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true		pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true		pdfView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true						

guard let path = Bundle.main.url(forResource: materia , withExtension: "pdf") else { return }		
if let document = PDFDocument(url: path) {				
    pdfView.document = document		
    pdfView.autoScales = true		
    pdfView.maxScaleFactor = 4.0		
    pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit	
}

2