你如何从 UIImagePickerController 获取图像文件名？

Question

我没有从照片库中获取图像名称。这里有人知道获取图像名称的正确方法吗？

注意：PHAsset.fetchAssets(withALAssetURLs: [imageURL], options: nil)这已被弃用。

Swift 仅

谢谢

Answer 1

我找到方法了

if let asset = info["UIImagePickerControllerPHAsset"] as? PHAsset{
            if let fileName = asset.value(forKey: "filename") as? String{
            print(fileName)
            }
        }

这将 return 您照片库中的实际文件名。

Answer 2

你说的是图片文件名吗？如果是这样，这应该对您有所帮助。在你的 UIImagePickerControllerDelegate 中：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    guard let fileUrl = info[UIImagePickerControllerImageURL] as? URL else { return }
    print(fileUrl.lastPathComponent)
}

Answer 3

试试下面的代码

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let asset = info[UIImagePickerControllerPHAsset] as? PHAsset {
        if let fileName = (asset.value(forKey: "filename")) as? String {
          print(\(fileName))
        }
    }

    // Other Stuff
}

Answer 4

如果您没有被授予访问照片库的权限，

UIImagePickerControllerPHAsset 就是 nil。 OS 不会自动询问并且仍然会让您访问该文件（我不知道这背后的逻辑是什么！）但是 PHAsset 是信息字典将为零！

Answer 5

请试试这个。

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let asset = info[UIImagePickerControllerPHAsset] as? PHAsset {
        let assetResources = PHAssetResource.assetResources(for: asset)
        print(assetResources.first!.originalFilename)
    }

    dismiss(animated: true, completion: nil)
}

Answer 6

更新 iOS 12，Swift 4，

这将直接为您提供文件名和文件扩展名

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

    guard let fileUrl = info[UIImagePickerController.InfoKey.imageURL] as? URL else { return }
    print(fileUrl.lastPathComponent) // get file Name
    print(fileUrl.pathExtension)     // get file extension
    dismiss(animated: true, completion: nil)
}

Answer 7

正确的做法是：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
  var imageName = "image_1"
  if let asset = info[.phAsset] as? PHAsset, let fileName = asset.value(forKey: "filename") as? String {
    imageName = fileName
  } else if let url = info[.imageURL] as? URL {
    imageName = url.lastPathComponent
  }
}

PHAsset 如果用户未授予您的应用访问库的权限，则 nil 将是 nil。如果您使用默认 UIImagePickerController，则不再需要此权限，因此，如果您的应用没有它们，OS 将使您临时访问图像的副本，您所能做的就是 fall回到路径 URL.

你如何从 UIImagePickerController 获取图像文件名？

How do you get image file name from UIImagePickerController?

iphone

uiimagepickercontroller

ios

swift