如何在swift中添加一个按钮来访问照片库到键盘？

Question

I'm building a chat app and I'd like to add the opportunity to send image. That's why I'd like to add a shortcut on the keyboard to access gallery or phone's camera.

I don't see it in the native keyboard type ( https://developer.apple.com/documentation/uikit/uikeyboardtype ) so I guess I've to do it programatically.

I've found nothing about it on the stackOverflow nor on the internet.

I'd like to have access to a keyboard like the one you can have in iMessage for example.

Answer 1

You can create your own view above the keyboard by editing NSLayoutConstraint constants. Here is an example storyboard.

storyboard and constraints

Then:

• Connect your NSLayoutConstraint to the View Controller

@IBOutlet weak var overKeyboardViewBottomConstraint: NSLayoutConstraint!

• Add keyboard listeners in your viewDidLoad method:

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil) NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil) 

• Create selectors for keyboard

  @objc func keyboardWillShow(notification: Notification) { if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue { UIView.animate(withDuration: 0.5) { [unowned self, keyboardSize] in self.overKeyboardViewBottomConstraint.constant = keyboardSize.height self.view.layoutIfNeeded() } } } @objc func keyboardWillHide(notification: Notification) { UIView.animate(withDuration: 0.5) { [unowned self] in self.overKeyboardViewBottomConstraint.constant = 0 self.view.layoutIfNeeded() } }

• Then your camera IBAction

  @IBAction func cameraAction(_ sender: Any) { let photos = PHPhotoLibrary.authorizationStatus() switch photos { case .notDetermined: print("not determined") PHPhotoLibrary.requestAuthorization({status in if status == .authorized{ self.showGallery() } else { print("access denied") } }) case .authorized: print("authorized") self.showGallery() case .denied: print("denied") default: break } }

• Finally your Gallery Function

  func showGallery() { if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) { let imagePicker = UIImagePickerController() imagePicker.delegate = self imagePicker.sourceType = .photoLibrary; imagePicker.allowsEditing = true self.present(imagePicker, animated: true, completion: nil) } }