错误:无法用索引类型为"UIImagePickerController.InfoKey"的下标"[String:Any]"类型的值

问题描述

我正在尝试重建Apple测试应用程序以通过CoreML进行图像检测，但是出现错误:

I am trying to rebuild the Apple test App for image detection via CoreML, but I have the error:

extension ImageClassificationViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: Any]) {
        picker.dismiss(animated: true)

        let image = info[UIImagePickerControllerOriginalImage] as! UIImage
        imageView.image = image
        updateClassifications(for: image)
    }

该错误出现在行中:

let image = info[UIImagePickerControllerOriginalImage] as! UIImage

推荐答案

您似乎正在使用Xcode 10/iOS12.委托方法的签名已更改.

It appears you are using Xcode 10/iOS 12. The signature of the delegate method changed.

对于info键，请使用UIImagePickerController.InfoKey而不是String.

Use UIImagePickerController.InfoKey instead of String for the info keys.

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any])

然后使用.originalImage代替UIImagePickerControllerOriginalImage.

extension ImageClassificationViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
        picker.dismiss(animated: true)

        let image = info[.originalImage] as! UIImage
        imageView.image = image
        updateClassifications(for: image)
    }

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