【Swift 2.1】共享檔案操作小結(iOS 8 +)
阿新 • • 發佈:2018-12-30
前言
適用於 iOS 8 + 本地共享檔案列表
宣告
歡迎轉載,但請保留文章原始出處:)
部落格園:http://www.cnblogs.com
農民伯伯: http://over140.cnblogs.com
正文
一、準備
1.1 預設 App 的檔案共享是關閉的,需要在 plist 中設定啟用:
Application supports iTunes file sharing 設定為 YES
啟用後把裝置連線到 iTunes 上,在 iTunes 應用裡的檔案共享就能看到你的 App 了(如果看不見需要斷開重新拔插一下資料線),可以拷貝一些視訊進去,便於測試。
1.2 匯入庫
Photos.framework
AVKit.framework 用於播放視訊
二、獲取視訊列表
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) } }
程式碼說明:
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 可以取到視訊的時長
CMTimeGetSeconds(AVURLAsset(URL: file.url, options: nil).duration)
三、播放視訊
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 ... 開啟
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、刪除視訊
func delete(file: File, indexPath: NSIndexPath) { do { try fileManager.removeItemAtPath(file.path) videos.removeAtIndex(indexPath.row) tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic) } catch { } }
六、儲存到相簿
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 } }
程式碼說明:
注意 UISaveVideoAtPathToSavedPhotosAlbum 的用法,後面 Selector 寫得不對就會報錯。
結束
一口氣寫完一個功能好爽