ҚОРҒАУҒа жіберілді
Ә қосымшасы (міндетті) Программа листингі 1 QR кодын құру
жүктеу/скачать 3,52 Mb.
|
Диплом Жандарбек
| Ә қосымшасы
(міндетті) Программа листингі 1 QR кодын құру class GeneratorViewController: UIViewController, UITextViewDelegate { @IBOutlet weak var scrollView: UIScrollView! @IBOutlet weak var imageView: UIImageView! @IBOutlet weak var textView: UITextView! @IBOutlet weak var correctionLevelSegmentControl: UISegmentedControl! override func viewDidLoad() { super.viewDidLoad() self.textView.delegate = self self.registerForKeyboardNotifications() let longPress = UILongPressGestureRecognizer(target: self, action: #selector(self.shareImage)) self.imageView.addGestureRecognizer(longPress) self.imageView.isUserInteractionEnabled = true self.refreshQRCode() self.hideKeyboardWhenTappedAround() } @IBAction func correctionLevelChanged(_ sender: Any) { self.refreshQRCode() } func textViewDidChange(_ textView: UITextView) { self.refreshQRCode() }
func refreshQRCode() { let text:String = self.textView.text // Generate the image guard let qrCode:CIImage = self.createQRCodeForString(text) else { print("Failed to generate QRCode") self.imageView.image = nil return } let viewWidth = self.imageView.bounds.size.width; let scale = viewWidth/qrCode.extent.size.width; let scaledImage = qrCode.transformed(by: CGAffineTransform(scaleX: scale, y: scale)) self.imageView.image = UIImage(ciImage: scaledImage) } func createQRCodeForString(_ text: String) -> CIImage?{ let data = text.data(using: .utf8) let qrFilter = CIFilter(name: "CIQRCodeGenerator") qrFilter?.setValue(data, forKey: "inputMessage")
let index = max(0, min(self.correctionLevelSegmentControl.selectedSegmentIndex, (values.count-1))) let correctionLevel = values[index] qrFilter?.setValue(correctionLevel, forKey: "inputCorrectionLevel") return qrFilter?.outputImage } @objc func shareImage() { guard let image = self.imageView.image else { return
} let activityViewController = UIActivityViewController(activityItems: [ self.sharableImage(image) ], applicationActivities: nil) activityViewController.popoverPresentationController?.sourceView = self.imageView self.present(activityViewController, animated: true, completion: nil) } func sharableImage(_ image: UIImage) -> UIImage{ let renderer = UIGraphicsImageRenderer(size: image.size, format: image.imageRendererFormat) let img = renderer.image { ctx in image.draw(at: CGPoint.zero) } return img } func registerForKeyboardNotifications(){ NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWasShown), name: UIResponder.keyboardDidShowNotification, object: nil) NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillBeHidden), name: UIResponder.keyboardWillHideNotification, object: nil) } @objc func keyboardWasShown(_ aNotification: NSNotification) { let info = aNotification.userInfo! let kbSize:CGSize = (info[UIResponder.keyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue.size let contentInsets:UIEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: kbSize.height, right: 0) self.scrollView.contentInset = contentInsets self.scrollView.scrollIndicatorInsets = contentInsets var aRect:CGRect = self.view.frame aRect.size.height -= kbSize.height
if (!aRect.contains(self.textView.frame.origin)) { let scrollPoint:CGPoint = CGPoint(x: 0, y: self.textView.frame.origin.y-kbSize.height) self.scrollView.setContentOffset(scrollPoint, animated: true) } }
let contentInsets = UIEdgeInsets.zero self.scrollView.contentInset = contentInsets; self.scrollView.scrollIndicatorInsets = contentInsets; } func hideKeyboardWhenTappedAround() { let tapGesture = UITapGestureRecognizer(target: self, action: #selector(hideKeyboard)) tapGesture.cancelsTouchesInView = false self.view.addGestureRecognizer(tapGesture) } @objc func hideKeyboard() { self.view.endEditing(true) } } жүктеу/скачать 3,52 Mb. Достарыңызбен бөлісу:
|