1、保存图片

private func saveImage(image: UIImage) {
        PHPhotoLibrary.shared().performChanges {
            PHAssetChangeRequest.creationRequestForAsset(from: image)
        } completionHandler: { isSuccess, error in
            if isSuccess {
                HUDTool.showMessage(L10n.saveSuccessfully)
            } else {
                HUDTool.showMessage(L10n.failToSave)
            }
        }
    }

2、保存视频

    private func saveVideo(url: URL) {
        HUDTool.showWait(L10n.beSaving)
        let fileName = "video_download_\(Int(Date().timeIntervalSince1970))"
        let filePath = URL(fileURLWithPath: NSTemporaryDirectory() + "\(fileName).mp4")
        MLog("filePath : \(filePath.absoluteString)")
        
        let destination: DownloadRequest.Destination = { _, _ in
            return (filePath, [.removePreviousFile, .createIntermediateDirectories])
        }
        
        AF.download(url, to: destination).response { _ in
            
            DispatchQueue.main.async {
                
                PHPhotoLibrary.shared().performChanges {
                    PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: filePath)
                } completionHandler: { isSuccess, error in
                    
                    DispatchQueue.global(qos: .background).async {
                        if FileManager.default.fileExists(atPath: filePath.path) {
                            try? FileManager.default.removeItem(atPath: filePath.path)
                        }
                    }
                    
                    if isSuccess {
                        HUDTool.showMessage(L10n.saveSuccessfully)
                    } else {
                        HUDTool.showMessage(L10n.failToSave)
                    }
                }
            }
        }
    }