Playground with PDF

Question

Moral OP

Created Nov ’17

Replies 6

Boosts 0

Views 3.7k

Participants 4

Hello!

I'm creating a project to quickly create views in my project. But for some reason, when I try to create an image with a pdf resource it's not working. Playgrounds and PDF resources are not compatible?

any clue?

thanks in advance!

Answered by DTS Engineer in 274808022

How are you creating the image? iOS’s PDF support is a lot more limited than macOS’s. So, for example, if you create an iOS app and add

test.pdf

resource to it, code like this:

let pdfURL = Bundle.main.url(forResource: "test", withExtension: "pdf")!
let image = UIImage(contentsOfFile: pdfURL.path)
print(image)

prints

nil

because UIImage doesn’t support reading from PDF directly.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

Boost

Answer 1

DTS Engineer OP

Apple

Nov ’17

Are you working on an iOS or macOS playground?

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

0

Answer 2

Moral OP

Nov ’17

I'm working on iOS playground

0

Answer 3

DTS Engineer OP

Apple

Nov ’17

Accepted Answer

How are you creating the image? iOS’s PDF support is a lot more limited than macOS’s. So, for example, if you create an iOS app and add

test.pdf

resource to it, code like this:

let pdfURL = Bundle.main.url(forResource: "test", withExtension: "pdf")!
let image = UIImage(contentsOfFile: pdfURL.path)
print(image)

prints

nil

because UIImage doesn’t support reading from PDF directly.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

1

Answer 4

Moral OP

Nov ’17

So, I can't create images with PDF resources in playgrounds. For instance, just as you said, It always will return nil

resources folder -> icon.pdf

let image = UIImage(named: "icon") // nil

thanks for your time!

0

Answer 5

pegasusroe OP

Oct ’20

First, make an Image extension:

Code Block swiftimport SwiftUI
extension Image {
    
    public init?(pdf url: URL) {
        
        guard 
            let doc  = CGPDFDocument(url as CFURL),
            let page = doc .page(at: 1) 
            else { return nil }
        
        let pageRect = page.getBoxRect(.mediaBox)
        let renderer = UIGraphicsImageRenderer(size: pageRect.size)
        
        let img = renderer.image { ctx in
            UIColor.clear.set()
            ctx.fill(pageRect)
            ctx.cgContext.translateBy(x: 0.0, y: pageRect.size.height)
            ctx.cgContext.scaleBy(x: 1.0, y: -1.0)
            ctx.cgContext.drawPDFPage(page)
        }
        
        self = Image(uiImage: img)
    }
}

Second, import your PDF into Swift Playgrounds (it works on my iPad, you have to try it yourself on Xcode) and use the extension:

Code Block swiftimport SwiftUI
import PlaygroundSupport
struct ContentView: View {
    var body: some View {
        VStack {
            Image(pdf: #fileLiteral(resourceName: "Card1.pdf"))
            Image(pdf: #fileLiteral(resourceName: "Card3.pdf"))
        }
            .padding()
            .shadow(radius: 8)
            .background(Color.gray)
            .cornerRadius(10)
    }
}
PlaygroundPage.current.setLiveView(ContentView())

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Answer 6

oaleeapp OP

Dec ’23

Use Xcode on Mac to open the Playground project, then create the xcassets file
Add your assets to the xcassets
Open the Playground file from Playground

then you should be able to use the image and see the Assets section

0