错误：无法使用“UIImagePickerController.InfoKey”类型的索引为“[String：Any]”类型的值下标 [重复]

【问题标题】：error: Cannot subscript a value of type '[String : Any]' with an index of type 'UIImagePickerController.InfoKey' [duplicate]错误：无法使用“UIImagePickerController.InfoKey”类型的索引为“[String：Any]”类型的值下标 [重复]
【发布时间】：2018-12-29 19:31:52
【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，但出现错误：

无法使用“UIImagePickerController.InfoKey”类型的索引为“[String : Any]”类型的值下标

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)
    }

错误出现在一行中：

let image = info[UIImagePickerControllerOriginalImage] as! UIImage

【问题讨论】：

标签： ios swift coreml

【解决方案1】：

看来您使用的是 Xcode 10/iOS 12。委托方法的签名已更改。

使用UIImagePickerController.InfoKey 而不是String 作为info 键。

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)
    }

【讨论】：