swift - UIImagePickerControllerDelegate 错误

Question

所以我有这段代码可以获取我的画廊中的照片或使用相机更改 UIImage。

@IBAction func tappedCamera() {
    print("tapped camera")

    let optionMenu = UIAlertController(title: nil, message: "Choose Option", preferredStyle: .actionSheet)

    let cameraAction = UIAlertAction(title: "Camera", style: .default, handler: {
        (alert: UIAlertAction!) -> Void in

        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) {
            self.picker.sourceType = UIImagePickerControllerSourceType.camera;
            self.picker.allowsEditing = true
            self.present(self.picker, animated: true, completion: nil)
        }

    })
    let galleryAction = UIAlertAction(title: "Gallery", style: .default, handler: {
        (alert: UIAlertAction!) -> Void in

        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) {
            self.picker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
            self.picker.allowsEditing = true
            self.present(self.picker, animated: true, completion: nil)
        }


    })
    let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: {
        (alert: UIAlertAction!) -> Void in
        //do none
    })


    optionMenu.addAction(cameraAction)
    optionMenu.addAction(galleryAction)
    optionMenu.addAction(cancelAction)

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

}

但每当我尝试拍摄照片或从图库中选择图像时，我总是会收到此错误。

[Generic] Creating an image format with an unknown type is an error

Answer 1

我通过修复用户默认值解决了这个问题。因为代码中的某个地方我搞乱了图像，将它们转换为 base64 字符串，然后将其保存为用户默认值。