如何检查视频是否已保存在照片库中

import Photos

func checkVideoInPhotoLibrary(videoURL: URL) -> Bool {
    let fetchOptions = PHFetchOptions()
    fetchOptions.predicate = NSPredicate(format: "mediaType == %d", PHAssetMediaType.video.rawValue)
    let fetchResult = PHAsset.fetchAssets(with: fetchOptions)
    
    var isVideoSaved = false
    fetchResult.enumerateObjects { (asset, _, _) in
        if let assetURL = asset.value(forKey: "filename") as? String {
            if assetURL == videoURL.lastPathComponent {
                isVideoSaved = true
            }
        }
    }
    
    return isVideoSaved
}

let videoURL = URL(fileURLWithPath: "path_to_video_file")
let isSaved = checkVideoInPhotoLibrary(videoURL: videoURL)
if isSaved {
    print("视频已保存在照片库中")
} else {
    print("视频未保存在照片库中")
}