ios - 如何使用 Assets 库获取 UIImagePickerController 中的文件名？

Question

我想从 UIImagePickerController 获取文件名。我不想使用 ALAssetLibrary，因为它在 iOS 9 中已被弃用。我使用了以下代码，但它始终将每个文件的图像名称返回为“Asset.jpg”。

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {       
    let originalImage = (info[UIImagePickerControllerOriginalImage] as? UIImage)!
    let url = info[UIImagePickerControllerReferenceURL] as! NSURL
    imageData = UIImageJPEGRepresentation(originalImage, 100) as NSData?
    let data = UploadData()
    data.fileName = url.lastPathComponent     
    picker.dismiss(animated: true, completion: nil)
}

Answer 1

import Photos

iOS 11 之前

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let imageURL = info[UIImagePickerControllerReferenceURL] as? URL {
        let result = PHAsset.fetchAssets(withALAssetURLs: [imageURL], options: nil)
        let assetResources = PHAssetResource.assetResources(for: result.firstObject!)

        print(assetResources.first!.originalFilename)
    }

    dismiss(animated: true, completion: nil)
}

iOS 11 之后

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let asset = info[UIImagePickerController.InfoKey.phAsset.rawValue] as? PHAsset {
    let assetResources = PHAssetResource.assetResources(for: asset)
    print(assetResources.first!.originalFilename)
  }
    dismiss(animated: true, completion: nil)
}