前言
适用于 iOS 8 + 本地共享文件列表
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
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
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 ... 打开
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、删除视频
func delete(file: File, indexPath: NSIndexPath) {
do {
try fileManager.removeItemAtPath(file.path)
videos.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
} catch {
}
}六、保存到相册
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。
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