iOS -使用AVAssetDownloadURLSession设置下载的总最大大小限制

let configuration = URLSessionConfiguration.background(withIdentifier: "com.example.download")
configuration.isDiscretionary = false
configuration.sessionSendsLaunchEvents = true

if #available(iOS 11.0, *) {
    configuration.waitsForConnectivity = true
}

let assetDownloadURLSession = AVAssetDownloadURLSession(configuration: configuration, assetDownloadDelegate: self, delegateQueue: OperationQueue.main)

if let url = URL(string: "https://example.com/media/video.mp4") {
    let asset = AVURLAsset(url: url)
    let downloadTask = assetDownloadURLSession.makeAssetDownloadTask(asset: asset, assetTitle: "Video", assetArtworkData: nil, options: nil)
    
    // 设置下载的总最大大小限制为100MB
    downloadTask?.maximumMediaSelectionFileSize = 100 * 1024 * 1024
    
    downloadTask?.resume()
}