printing with swiftui

Question

Created Jun ’20

Replies 4

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I created a new macOS document-based app in Xcode Version 11.5 (11E608c), and modified ContentView to look like this: struct ContentView: View { var body: some View { ZStack { Circle() .foregroundColor(.red) .frame(width: 30, height: 30, alignment: .center) Text("Hello, World!") } .frame(maxWidth: .infinity, maxHeight: .infinity) } } I made no other changes other than to enable the print capability. The canvas and app itself look just as you'd expect. When I run File->Print, however, only the window, its frame, and the text show up in the print preview and on the printed page. The circle graphic is missing, even though the appropriate light/dark mode background is there. Is this a bug, or is there something else required to enable graphics to print from SwiftUI?

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Answer 1

feldur OP

Jun ’20

Apologies for the lack of formatting. I expected leading spaces would do it.

0

Answer 2

Claude31 OP

Jun ’20

That will look better:

struct ContentView: View {
    var body: some View {
        ZStack {
            Circle()
                .foregroundColor(.red)
                .frame(width: 30, height: 30, alignment: .center)
            Text("Hello, World!")
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
       
    }
}

I tried the same. And got the same problem…

That looks like a limit of built in print command.

You probably have to do as in MacOS to print in a graphic port ?

Tutorials are silent about it …

https://developer.apple.com/tutorials/swiftui/creating-a-macos-app

0

Answer 3

udsl OP

Jun ’20

@feldur

Did you find a solution to this issue?

I have exhausted my ability to Google over the last couple of days trying to solve the issue.

In my case I have a view with a background Image + some text. The text prints fine on a nice clean background - no image!

Print code:

Code Block language   @IBAction func print2(_ sender : Any){
    		let printingView = self.window.contentView
    		let printInfo = NSPrintInfo()
    		let printOperation = NSPrintOperation(view: printingView!, printInfo: printInfo)
    		printOperation.showsPrintPanel = true
    		printOperation.showsProgressPanel = true
    		printOperation.run()
  }

I am using latest version of Xcode Swift and SwiftUi

1

Answer 4

LogicalLight OP

Aug ’21

I've seen Paul Hudson's sample on simple printing, (https://www.hackingwithswift.com/example-code/uikit/how-to-print-using-uiactivityviewcontroller). I'm still looking for how to present a system share sheet, which should allow me to "export" data to whatever form a share action wants, be it printing, tweeting, emailing, and so on.

(Apple forums doesn't like me to post live URLs to that site: This domain "https://www.hackingwithswift.com/example-code/uikit/how-to-print-using-uiactivityviewcontroller" is not a permitted domain on this forums.)

No sooner do I post this than I finally find an example that looks like it'll work (https://jeevatamil.medium.com/how-to-create-share-sheet-uiactivityviewcontroller-in-swiftui-cef64b26f073). I'll try to remember to post working code that connects this to printing.

0