swift - 图像未显示在 uiimageview 中

Question

我想从库中获取图片，但是在我从库中选择之前图片不会显示

这是我的代码

@IBAction func btnProfile(_ sender: UIButton) {
        let alert = UIAlertController(title: "Change Profil Image", message: "Pilih Foto", preferredStyle: UIAlertControllerStyle.actionSheet)
        alert.addAction(UIAlertAction(title: "Gunakan Kamera", style: .default, handler: { (action: UIAlertAction!) in
            print("Gunakan Kamera")
            if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera){
                let imagePicker = UIImagePickerController()
                imagePicker.delegate = self
                imagePicker.sourceType = UIImagePickerControllerSourceType.camera;
                imagePicker.allowsEditing = false
                self.present(imagePicker, animated: true, completion: nil)
            }
        }))
        alert.addAction(UIAlertAction(title: "Ambil Foto dari Galery", style: .default, handler: { (action: UIAlertAction!) in
            print("Ambil Foto dari Galery")
            if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary){
                let imagePicker = UIImagePickerController()
                imagePicker.delegate = self
                imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
                imagePicker.allowsEditing = true
                self.present(imagePicker, animated: true, completion: nil)

            }
        }))
        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { (action: UIAlertAction!) in
            print("Cancel")
        }))
        present(alert, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

    guard let image = info[.originalImage] as? UIImage else { return } // error in here >> 'UIImage?' is not convertible to 'UIImage' >> and warning yellow >> Cast from 'Slice<Dictionary<UIImagePickerController.InfoKey, Any>>' (aka 'Slice<Dictionary<NSString, Any>>') to unrelated type 'UIImage' always fails

    picker.dismiss(animated: true, completion: nil)

    imgProf.image = image
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    dismiss(animated: true, completion: nil)
}

我想在 UIimageview 上显示图像，但是从库中检索图像后，它并不总是出现，guard let 图像错误，并在其中发出黄色警告我使用 swift 3

这是 UIImagePickerControllerDelegate

public protocol UIImagePickerControllerDelegate : NSObjectProtocol {


    @available(iOS 2.0, *)
    optional public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])

    @available(iOS 2.0, *)
    optional public func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
}

Answer 1

我试过这段代码，它成功了

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

        var selectedImageFromPicker: UIImage?
        if let editedImage = info[UIImagePickerControllerEditedImage] as? UIImage {
            selectedImageFromPicker = editedImage
        } else if let originalImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
            selectedImageFromPicker = originalImage
        }

        if let selectedImage = selectedImageFromPicker {
            imgProf.image = selectedImage
        }
        dismiss(animated: true, completion: nil)
    }

感谢@Kamran，你对改变立场的回答是正确的