How to share generated UIImage with siwft 4 - swift

Question

Hi I use this function to create an UIImage of QRCode
func generateQRCode(string: String){
let data = string.data(using: String.Encoding.ascii)
if let filter = CIFilter(name: "CIQRCodeGenerator") {
filter.setValue(data, forKey: "inputMessage")
let transform = CGAffineTransform(scaleX: 3, y: 3)
if let output = filter.outputImage?.transformed(by: transform) {
imageQRCode.image = UIImage(ciImage: output)
qrImage = UIImage(ciImage: output)
self.tableView.reloadData()
}
}
}
After I have generated the image I want to save or print it.
I used this function
let shareText = NSLocalizedString("SHARE_QR_TITLE", comment: "")
if let image = qrImage {
let vc = UIActivityViewController(activityItems: [shareText, image], applicationActivities: [])
present(vc, animated: true)
}
but I can't share it. I received this error: "[ShareSheet] connection invalidate"

Answer 1

Try this it's work for me but not showing qrcode by sharing in whatsApp. Working fine with messages, mail, telegram..
import UIKit
class QRCodeGeneratorViewController: UIViewController {
#IBOutlet var qrImageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
func generateQRCode(from string: String) -> UIImage? {
let data = string.data(using: String.Encoding.ascii)
if let filter = CIFilter(name: "CIQRCodeGenerator") {
filter.setValue(data, forKey: "inputMessage")
let transform = CGAffineTransform(scaleX: 3, y: 3)
if let output = filter.outputImage?.transformed(by: transform) {
return UIImage(ciImage: output)
}
}
return nil
}
#IBAction func generateQRAction(_ sender: Any) {
let image = generateQRCode(from: "iOS Developer")
qrImageView.image = image
}
#IBAction func btnShareClk(_ sender: Any) {
let shareText = "Hello, world!"
if let image = qrImageView.image {
let vc = UIActivityViewController(activityItems: [shareText, image], applicationActivities: [])
present(vc, animated: true)
vc.popoverPresentationController?.sourceView = self.qrImageView
}
}