前言
正文
一、准备
1.1 默认 App 的文件共享是关闭的，需要在 plist 中设置启用：
Application supports iTunes file sharing 设置为 YES
启用后把设备连接到 iTunes 上，在 iTunes 应用里的文件共享就能看到你的 App 了（如果看不见需要断开重新拔插一下数据线），可以拷贝一些视频进去，便于测试。
1.2 导入库
Photos.framework
AVKit.framework 用于播放视频
二、获取视频列表
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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)
}
}
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代码说明：
a）需要注意一些 swift 的用法，例如 fileExistsAtPath 的用法
b）还有 String 的 pathExtension 和 lastPathComponent 都没了，都改到了 NSURL 下面去了，网上很多资料都还是从 NSString 或者 String 取这些属性
c）AVURLAsset 可以取到视频的时长 CMTimeGetSeconds(AVURLAsset(URL: file.url, options: nil).duration)
三、播放视频
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func play(file: File) {
let player = AVPlayer(URL: file.url)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
self.presentViewController(playerViewController, animated: true) {
playerViewController.player?.play()
}
}
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四、用 ... 打开
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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)
}
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五、删除视频
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func delete(file: File, indexPath: NSIndexPath) {
do {
try fileManager.removeItemAtPath(file.path)
videos.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
} catch {
}
}
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六、保存到相册
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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
}
}
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代码说明：
注意 UISaveVideoAtPathToSavedPhotosAlbum 的用法，后面 Selector 写得不对就会报错。
以上就是IOS 8 共享文件的实例代码，有需要的朋友可以参考下。