如何在swift中添加一个按钮来访问照片库到键盘？

Question

我正在构建一个聊天应用程序，我想添加发送图像的机会。 这就是为什么我想在键盘上添加一个快捷方式来访问图库或手机的相机。

我没有在原生键盘类型（ https://developer.apple.com/documentation/uikit/uikeyboardtype ）中看到它，所以我想我要以编程方式进行。

我在stackOverflow上和互联网上都没有发现它。

我想要访问类似于iMessage中可用的键盘。

Answer 1

您可以通过编辑NSLayoutConstraint常量在键盘上方创建自己的视图。 这是一个示例故事板。

故事板和约束

然后：

• 将NSLayoutConstraint连接到View Controller

@IBOutlet weak var overKeyboardViewBottomConstraint: NSLayoutConstraint!

• 在viewDidLoad方法中添加键盘侦听器：

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

• 为键盘创建选择器

  @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() } }

• 然后你的相机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 } }

• 最后你的画廊功能

  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) } }