使用Haneke，我无法检索缓存视频的文件路径。我通过将视频保存在缓存的目录中来处理它。
public enum Result<T> { case success(T) case failure(NSError)}class CacheManager { static let shared = CacheManager() private let fileManager = FileManager.default private lazy var mainDirectoryUrl: URL = { let documentsUrl = self.fileManager.urls(for: .cachesDirectory, in: .userDomainMask).first! return documentsUrl }() func getFileWith(stringUrl: String, completionHandler: @escaping (Result<URL>) -> Void ) { let file = directoryFor(stringUrl: stringUrl) //return file path if already exists in cache directory guard !fileManager.fileExists(atPath: file.path) else { completionHandler(Result.success(file)) return } DispatchQueue.global().async { if let videoData = NSData(contentsOf: URL(string: stringUrl)!) { videoData.write(to: file, atomically: true) DispatchQueue.main.async { completionHandler(Result.success(file)) } } else { DispatchQueue.main.async { completionHandler(Result.failure(NSError.errorWith(text: "Can't download video"))) } } } } private func directoryFor(stringUrl: String) -> URL { let fileURL = URL(string: stringUrl)!.lastPathComponent let file = self.mainDirectoryUrl.appendingPathComponent(fileURL) return file }}该类的示例用法如下所示：
CacheManager.shared.getFileWith(stringUrl: "http://techslides.com/demos/sample-videos/small.mp4") { result in switch result { case .success(let url): // do some magic with path to saved video case .failure(let error): // handle errror } }
