ios - 尝试从照片库将图像加载到 UIImageView 时出现 Swift 4 错误

Question

我一直在尝试修复从照片应用程序库导入图片时出现的错误。我查看了一下，发现它是一个字典键值问题？我很困惑任何帮助都会很棒。下面的代码以及错误。

@IBAction func onClickPickImage(_ sender: Any) {

    imagePicker.sourceType = .photoLibrary
    imagePicker.allowsEditing = true
    present(imagePicker, animated: true, completion: nil)

}
}

extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {

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

    if let image = info[UIImagePickerControllerOriginalImage] as? Any {
        img.image = image
    }

    dismiss(animated: true, completion: nil)
}

错误 '无法使用 UIImagePickerController.InfoKey 类型的索引为 [String : Any] 类型的值添加下标

Answer 1

应该是这样的

let tempImage = info[UIImagePickerControllerOriginalImage] as! UIImage

对于可选绑定(bind)，请使用如下代码:

if let image = info[UIImagePickerControllerOriginalImage] as? UIImage{

}