How to Take a Full Screen Screenshot in Swift

Getting a full screenshot of a UIScrollView in iOS 13

It's seems like iOS 13 bug but I found the solution in this answer.

The solution is I am removing scrollview from superview and then adding in with its old constraints after taking the screenshot. Yeah, it's stupid but it just works that way :(

scrollView.removeFromSuperview()
let print = scrollView.screenshot()
mainView.addSubview(scrollView)
scrollView.snp.makeConstraints { (make) in
    make.top.equalTo(topView.snp.bottom)
    make.left.bottom.right.equalToSuperview()
}

Get screenshot of current screen in iOS/swift for sharing

// to create an image from screenshot

UIGraphicsBeginImageContext(view.frame.size)
view.layer.renderInContext(UIGraphicsGetCurrentContext())
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

// to share the image

var imagesToShare = [AnyObject]()
imagesToShare.append(image)

let activityViewController = UIActivityViewController(activityItems: imagesToShare , applicationActivities: nil)
activityViewController.popoverPresentationController?.sourceView = self.view
presentViewController(activityViewController, animated: true, completion: nil)

How to take screenshot of a UIView in swift?

For drawing of one view, just use this:

    // Begin context
    UIGraphicsBeginImageContextWithOptions(view.bounds.size, false, UIScreen.mainScreen().scale)

    // Draw view in that context
    drawViewHierarchyInRect(view.bounds, afterScreenUpdates: true)

    // And finally, get image
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

If you want to use it multiple times, probably extension would do the job:

//Swift4

extension UIView {

    func takeScreenshot() -> UIImage {

        // Begin context
        UIGraphicsBeginImageContextWithOptions(self.bounds.size, false, UIScreen.main.scale)

        // Draw view in that context
        drawHierarchy(in: self.bounds, afterScreenUpdates: true)

        // And finally, get image
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        if (image != nil)
        {
            return image!
        }
        return UIImage()
    }
}

//Old Swift

extension UIView {

    func takeScreenshot() -> UIImage {

        // Begin context
        UIGraphicsBeginImageContextWithOptions(self.bounds.size, false, UIScreen.mainScreen().scale)

        // Draw view in that context
        drawViewHierarchyInRect(self.bounds, afterScreenUpdates: true)

        // And finally, get image
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return image
    }
}

To explain what those parameters do:

UIGraphicsBeginImageContextWithOptions() creates a temporary rendering
context into which the original is drawn. The first argument, size, is
the target size of the scaled image. The second argument, isOpaque is
used to determine whether an alpha channel is rendered. Setting this
to false for images without transparency (i.e. an alpha channel) may
result in an image with a pink hue. The third argument scale is the
display scale factor. When set to 0.0, the scale factor of the main
screen is used, which for Retina displays is 2.0 or higher (3.0 on the
iPhone 6 Plus).

More about it here http://nshipster.com/image-resizing/

As for the draw call, Apple Docs explains it to detail here and here

Save a screenshot as pdf or high resolution-image using Swift 5 xcode 13

Just convert your image to pdf via PDFKit

import PDFKit
let pdfPage = PDFPage(image: screenshotImage) 
let fm = FileManager.default urls = fm.urls(for: .documentDirectory, in: .userDomainMask).first! 
let savedPDF = urls!.appendingPathComponent("pdfPage.pdf") pdfPage?.document?.write(toFile: "pdfPage")

Take a full screenshot for all webview in swift

Try the following code after web view is loaded:

EDITED: run this code in simulator then check the screenshot.jpeg file in your documents app directory

class ViewController: UIViewController,UIWebViewDelegate {

let fileDirectory = NSSearchPathForDirectoriesInDomains(
    .DocumentDirectory, .UserDomainMask, true)

@IBOutlet weak var webView: UIWebView!

override func viewDidLoad() {


    var urlPath = "http://www.bbc.com/"
    let requestUrl = NSURL(string: urlPath)
    let request = NSURLRequest(URL: requestUrl!)
    webView.loadRequest(request)
    webView.delegate = self

}

func webViewDidFinishLoad(webView: UIWebView) {


    if (!webView.loading){

        var webViewFrame = webView.frame

        webView.frame = CGRectMake(webViewFrame.origin.x, webViewFrame.origin.y, webView.scrollView.contentSize.width, webView.scrollView.contentSize.height)

        UIGraphicsBeginImageContextWithOptions(webView.scrollView.contentSize, false, 0);
        self.webView.layer.renderInContext(UIGraphicsGetCurrentContext())
        var image:UIImage = UIGraphicsGetImageFromCurrentImageContext();
        var imageData = UIImageJPEGRepresentation(image, 0.7)
        var currentFileName = "screenshot.jpeg"
        var imageFilePath = fileDirectory[0].stringByAppendingPathComponent(currentFileName)
        var imageFileURL = NSURL(fileURLWithPath: imageFilePath)
        imageData.writeToURL(imageFileURL!, atomically: false)
        webView.frame = webViewFrame
    }
}

}