Question

我的应用程序中有一个viewController，它随被调用的相机一起打开。当用户拍照并按“使用照片”时，图像应显示在同一viewController的imageView中。

我知道它可能看起来像是重复的（！）-但是我在这里读到了很多有关显示imagePicker中的图像的问题，到目前为止，它们的解决方案都不适合我。

基本上，在控制台或代码中都没有错误。 -但是，当我在设备上运行该应用程序时，按“使用照片”后该应用程序将冻结，然后我必须关闭该应用程序。

我现在唯一的想法是有一些常规的隐私使用设置或类似的设置，为了显示用户的照片，我需要对其进行设置，但是在那种情况下，我不知道该使用哪种方式！

请帮助！

代码：

class CreateNewPerson: UIViewController, UITextFieldDelegate,
UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var personPhoto: UIImageView!
    let imagePicker = UIImagePickerController()

    override func viewDidAppear (_ animated: Bool) {
        checkCameraPermissions()
        super.viewDidAppear(true)
    }

    private func checkCameraPermissions() {
        let status = AVCaptureDevice.authorizationStatus(for: .video)
        switch status {
        case .authorized: self.presentPicker()
        case .notDetermined: self.requestAccess()
        case .denied: print("Permission denied.")
        case .restricted: print("Permission restricted.")
        }
    }

    private func requestAccess() {
        AVCaptureDevice.requestAccess(for: AVMediaType.video) { granted in
            if !granted {
                print("Error.")
            } else {
                self.checkCameraPermissions()
            }
        }
    }

    private func presentPicker() {
        imagePicker.delegate = self
        imagePicker.sourceType = .camera
        present(imagePicker, animated: true, completion: nil)
    }

    private func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : UIImage]) {
        let chosenImage = info[UIImagePickerControllerOriginalImage]
        imagePicker.delegate = self
        personPhoto.contentMode = .scaleAspectFit
        personPhoto.image = chosenImage
        dismiss(animated: true, completion: nil)
    }
}

是的-基本上，这只是问题的最后一种方法！相机会显示所有内容，但我无法显示照片。我的方法出了什么问题？

谢谢！

Answer 1

由于您只需要展示iOS标准图像选择器，因此不需要AVCaptureDevice拥有这些权限，甚至根本不需要import AVFoundation！

class CreateNewPerson: UIViewController, UITextFieldDelegate,
UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var personPhoto: UIImageView!
    let imagePicker = UIImagePickerController()

    private func presentPicker() {
        imagePicker.delegate = self
        imagePicker.sourceType = .camera
        present(imagePicker, animated: true, completion: nil)
    }

    // Swift 4.2
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        let chosenImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
        personPhoto.contentMode = .scaleAspectFit
        personPhoto.image = chosenImage
        picker.dismiss(animated: true, completion: nil)
    }

    /*
    // Swift 4.1
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        personPhoto.contentMode = .scaleAspectFit
        personPhoto.image = chosenImage
        picker.dismiss(animated: true, completion: nil)
    }
    */
}

来自imagePicker的图像只会显示在我的imageView中

1 个答案: