swift - ImagePicker 确认 View 对齐

Question

我正在使用 UIImagePickerController 来拍照。拍完照片后，我会看到一个 View 来确认拍摄或重拍。该 View 的对齐方式不同，看起来像是与屏幕底部对齐。有没有办法将两个 View 对齐到屏幕顶部，或者我可以跳过此步骤吗？

imagePickerController = UIImagePickerController()
imagePickerController.delegate = self

//check if camera is available
if UIImagePickerController.isSourceTypeAvailable(.camera) {
    imagePickerController.sourceType = .camera
} else {
    imagePickerController.sourceType = .photoLibrary
}

self.present(imagePickerController, animated: true, completion: nil)

Answer 1

嗯，您无法使用自定义控件来显示该确认屏幕。这是一个非常简单的例子:

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

  @IBOutlet weak var textField: UITextField!
  var imagePickerController: UIImagePickerController!

  override func viewDidLoad() {
    super.viewDidLoad()

    guard UIImagePickerController.isSourceTypeAvailable(.camera) else { return }
    imagePickerController = UIImagePickerController()
    imagePickerController.sourceType = .camera
    imagePickerController.showsCameraControls = false
    imagePickerController.delegate = self

    // Button to take picture
    let takePictureButton = UIButton()
    takePictureButton.setTitle("Take Picture", for: .normal)
    imagePickerController.view.addSubview(takePictureButton)

    // Positioning button
    takePictureButton.translatesAutoresizingMaskIntoConstraints = false
    NSLayoutConstraint.activate([
      takePictureButton.centerXAnchor.constraint(equalTo: imagePickerController.view.centerXAnchor),
      takePictureButton.bottomAnchor.constraint(equalTo: imagePickerController.view.bottomAnchor, constant: -50)
      ])

    // Set button target
    takePictureButton.addTarget(self, action: #selector(didTouchTakePictureButton(_:)), for: .touchUpInside)

    self.present(imagePickerController, animated: true, completion: nil)
  }

  @objc func didTouchTakePictureButton(_ sender: UIButton) {
    imagePickerController.takePicture()
  }

  func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    guard let image = info[.originalImage] as? UIImage else { return }
  }
}

但请注意以下事项: 1. 源类型仅允许使用.camera； 2.您没有任何控件，因此您必须自己添加所有自定义；

希望这有帮助!