前言
適用于 iOS 8 + 本地共享文件列表
正文
一、準備
1.1 默認 App 的文件共享是關閉的，需要在 plist 中設置啟用：
Application supports iTunes file sharing 設置為 YES
啟用后把設備連接到 iTunes 上，在 iTunes 應用里的文件共享就能看到你的 App 了（如果看不見需要斷開重新拔插一下數據線），可以拷貝一些視頻進去，便于測試。
1.2 導入庫
Photos.framework
AVKit.framework 用于播放視頻
二、獲取視頻列表
private let VIDEO_EXTENSIONS = [ ".MOV", ".MP4" ] private var fileManager = NSFileManager.defaultManager() func loadVideos() { var paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) if paths.count > 0 { let documentsDirectory = paths[0] as String let documentUrl = NSURL(fileURLWithPath: documentsDirectory, isDirectory: true) do { documentUrl.path let files = try fileManager.contentsOfDirectoryAtPath(documentsDirectory) for file in files { fetchVideos(documentUrl.URLByAppendingPathComponent(file).path ?? "") } } catch { } self.tableView.reloadData() } } func fetchVideos(path: String) { var isDir: ObjCBool = false if !path.isEmpty && fileManager.fileExistsAtPath(path, isDirectory: &isDir) { if isDir { do { let files = try fileManager.contentsOfDirectoryAtPath(path) for file in files { fetchVideos(file) } } catch { } } else { var file = File(path: path) if file.isValid() && isVideoFileExtension(file.fileExtension.uppercaseString) { do { if let attr: NSDictionary = try fileManager.attributesOfItemAtPath(path) { file.fileSize = attr.fileSize() } } catch { } videos.append(file) } } } } func isVideoFileExtension(ext: String) -> Bool { for videoExtension in VIDEO_EXTENSIONS { if ext == videoExtension { return true } } return false } struct File { var fileExtension = "" var fileName = "" var path = "" var assert: AVURLAsset? var url: NSURL! var fileSize: UInt64 = 0 init(path: String) { self.path = path self.url = NSURL(fileURLWithPath: path) self.fileName = url.lastPathComponent ?? "" self.fileExtension = "." + (url.pathExtension ?? "") } func isValid() -> Bool { return !(fileName.isEmpty || fileExtension.isEmpty) } }代碼說明：
a）需要注意一些 swift 的用法，例如 fileExistsAtPath 的用法
b）還有 String 的 pathExtension 和 lastPathComponent 都沒了，都改到了 NSURL 下面去了，網上很多資料都還是從 NSString 或者 String 取這些屬性
c）AVURLAsset 可以取到視頻的時長 CMTimeGetSeconds(AVURLAsset(URL: file.url, options: nil).duration)
三、播放視頻
func play(file: File) { let player = AVPlayer(URL: file.url) let playerViewController = AVPlayerViewController() playerViewController.player = player self.presentViewController(playerViewController, animated: true) { playerViewController.player?.play() } }四、用 ... 打開
func openIn(file: File, indexPath: NSIndexPath) { let document = UIDocumentInteractionController(URL: file.url) let rect = self.tableView.rectForRowAtIndexPath(indexPath) document.presentOpenInMenuFromRect(rect, inView: self.tableView, animated: true) }五、刪除視頻
func delete(file: File, indexPath: NSIndexPath) { do { try fileManager.removeItemAtPath(file.path) videos.removeAtIndex(indexPath.row) tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic) } catch { } }六、保存到相冊
func saveToCameraRoll(file: File, indexPath: NSIndexPath) { if UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(file.path) { UISaveVideoAtPathToSavedPhotosAlbum(file.path, self, "image:didFinishSavingWithError:contextInfo:", nil) } else { // save faild } } func image(image: UIImage, didFinishSavingWithError error: NSErrorPointer, contextInfo:UnsafePointer<Void>) { if error == nil { // save success } else { // save faild } }代碼說明：
注意 UISaveVideoAtPathToSavedPhotosAlbum 的用法，后面 Selector 寫得不對就會報錯。
以上就是IOS 8 共享文件的實例代碼，有需要的朋友可以參考下。
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