How does one Print all WKWebView On AND Offscreen content OSX and iOS

Question

This question is about printing ALL content (including off screen content) of WKWebView. Currently (still, as of iOS 10.2 or OSX 10.12) there is NO working solution

Answer 1

This isn't the correct answer because Apple needs to supply the correct answer with a working print method or .evaluateJavaScript("window.print()", completionHandler: nil)

But I have a stupid solution that "works" for me and perhaps it will help other people with a work around until then.

Step 1: Grab the HTML and fixup the tag with . If you are fetching the html from someplace and not loading your own, you'll want to use some regular expressions. I won't go into that.

Step 2: Save the html in a file someplace and keep the full path in a variable. In my example: filename

Step 3: Wire your print button to this code:

RunCommand(command: "/usr/bin/open \(filename)")

See code for RunCommand below. This leaves a dumb safari window laying around, but it makes it possible to get something printed without saving to a file and then remembering where you stuck it so you can open it with Safari on your own to do the printing.

func RunCommand(command: String)  -> (success: Bool, result: String) {
        let cc = command.components(separatedBy: " ")
        let process = Process()
        process.launchPath = cc[0]
        var cp: [String] = []
        for i in (1.. 0) {
            let output = String(data: data, encoding: String.Encoding.utf8)
            // let output = NSString(data: data, encoding: String.Encoding.utf8.rawValue)
            return (success: true, result: output!)
        }
        return (success: true, result: "")

    }

It would be really nice if Apple could fix this. I have an in-house app that does all its reporting in HTML and reports are something you kind of want to print.