如何获取iPhone中所有video文件的列表

我想要获取iPhone内部存储的所有video文件（录制的和iPod）的列表。 我想在我的应用程序中显示所有的video文件。

我有一个TableViewController并希望在我的应用程序中显示iPhone的所有video文件。

我如何获得所有video文件的列表？

Answer 1

你必须使用assetLibraries试试这段代码：

 - (void)updateAssetsLibrary { loadImgView.hidden = NO; [spinner startAnimating]; //selectVideoBtn .userInteractionEnabled = NO; assetItems = [NSMutableArray arrayWithCapacity:0]; ALAssetsLibrary *assetLibrary = assetsLibrary; [assetLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) { if (group) { [group setAssetsFilter:[ALAssetsFilter allVideos]]; [group enumerateAssetsUsingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop) { if (asset) { dic = [[NSMutableDictionary alloc] init]; ALAssetRepresentation *defaultRepresentation = [asset defaultRepresentation]; NSString *uti = [defaultRepresentation UTI]; appDelegate.videoURL = [[asset valueForProperty:ALAssetPropertyURLs] valueForKey:uti]; mpVideoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:appDelegate.videoURL]; NSString *title = [NSString stringWithFormat:@"%@ %i", NSLocalizedString(@"Video", nil), [assetItems count]+1]; [self performSelector:@selector(imageFromVideoURL)]; [dic setValue:title forKey:kName]; [dic setValue:appDelegate.videoURL forKey:kURL]; AssetBrowserItem *item = [[AssetBrowserItem alloc] initWithURL:appDelegate.videoURL title:title]; [assetItems addObject:item]; [appDelegate.videoURLArray addObject:dic]; NSLog(@"Video has info:%@",appDelegate.videoURLArray); } NSLog(@"Values of dictonary==>%@", dic); //NSLog(@"assetItems:%@",assetItems); NSLog(@"Videos Are:%@",appDelegate.videoURLArray); } ]; } // group == nil signals we are done iterating. else { dispatch_async(dispatch_get_main_queue(), ^{ //[self updateBrowserItemsAndSignalDelegate:assetItems]; loadImgView.hidden = NO; [spinner stopAnimating]; [loadImgView removeFromSuperview]; //selectVideoBtn .userInteractionEnabled = YES; }); } } failureBlock:^(NSError *error) { NSLog(@"error enumerating AssetLibrary groups %@\n", error); }]; } - (UIImage *)imageFromVideoURL { // result UIImage *image = nil; // AVAssetImageGenerator AVAsset *asset = [[AVURLAsset alloc] initWithURL:appDelegate.videoURL options:nil];; AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset]; imageGenerator.appliesPreferredTrackTransform = YES; // calc midpoint time of video Float64 durationSeconds = CMTimeGetSeconds([asset duration]); CMTime midpoint = CMTimeMakeWithSeconds(durationSeconds/2.0, 600); // get the image from NSError *error = nil; CMTime actualTime; CGImageRef halfWayImage = [imageGenerator copyCGImageAtTime:midpoint actualTime:&actualTime error:&error]; if (halfWayImage != NULL) { // cgimage to uiimage image = [[UIImage alloc] initWithCGImage:halfWayImage]; [dic setValue:image forKey:kImage]; NSLog(@"Values of dictonary==>%@", dic); NSLog(@"Videos Are:%@",appDelegate.videoURLArray); CGImageRelease(halfWayImage); } return image; } - (void)assetsLibraryDidChange:(NSNotification*)changeNotification { [self updateAssetsLibrary]; } - (void)buildAssetsLibrary { assetsLibrary = [[ALAssetsLibrary alloc] init]; ALAssetsLibrary *notificationSender = nil; NSString *minimumSystemVersion = @"4.1"; NSString *systemVersion = [[UIDevice currentDevice] systemVersion]; if ([systemVersion compare:minimumSystemVersion options:NSNumericSearch] != NSOrderedAscending) notificationSender = assetsLibrary; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(assetsLibraryDidChange:) name:ALAssetsLibraryChangedNotification object:notificationSender]; [self updateAssetsLibrary]; } 

这段代码会给你的iPhonevideo列表。

它可以帮助你谢谢:)

Answer 2

获取所有video和缩略图列表

借助上面的答案，我得到了它的工作..

感谢@Nikhil Bansal，

它帮助了我，但仍然需要几个小时才能使代码可执行，因为他在答案中缺less了一些东西

所以我想分享我的完整工作代码

1.只需添加框架AssetsLibrary ， AVFoundation和MediaPlayer 。

2. AssetBrowserItem.h和AssetBrowserItem.m 在这里

3.使用下面的代码来获取来自ios设备库的所有video列表

4.运行应用程序，并查看日志中的video详细信息

 #import "HomeViewController.h" #import <AssetsLibrary/AssetsLibrary.h> #import <MediaPlayer/MediaPlayer.h> #import <AVFoundation/AVFoundation.h> #import "AssetBrowserItem.h" @interface HomeViewController () @property (nonatomic, strong) ALAssetsLibrary *assetsLibrary; @property (nonatomic, strong) NSURL *videoURL; @property (nonatomic, strong) MPMoviePlayerController *mpVideoPlayer; @property (nonatomic, strong) NSMutableArray *videoURLArray; @property (nonatomic, strong) NSMutableArray *assetItems; @property (nonatomic, strong) NSMutableDictionary *dic; @end @implementation HomeViewController @synthesize assetsLibrary, assetItems,dic; @synthesize videoURL,videoURLArray, mpVideoPlayer; - (void)viewDidLoad { [super viewDidLoad]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } #pragma mark - Show Video List Methods - (IBAction)showVideoList:(id)sender { [self buildAssetsLibrary]; } - (void)buildAssetsLibrary { assetsLibrary = [[ALAssetsLibrary alloc] init]; ALAssetsLibrary *notificationSender = nil; videoURLArray = [[NSMutableArray alloc] init]; NSString *minimumSystemVersion = @"4.1"; NSString *systemVersion = [[UIDevice currentDevice] systemVersion]; if ([systemVersion compare:minimumSystemVersion options:NSNumericSearch] != NSOrderedAscending) notificationSender = assetsLibrary; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(assetsLibraryDidChange:) name:ALAssetsLibraryChangedNotification object:notificationSender]; [self updateAssetsLibrary]; } - (void)assetsLibraryDidChange:(NSNotification*)changeNotification { [self updateAssetsLibrary]; } - (void)updateAssetsLibrary { assetItems = [NSMutableArray arrayWithCapacity:0]; ALAssetsLibrary *assetLibrary = assetsLibrary; [assetLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) { if (group) { [group setAssetsFilter:[ALAssetsFilter allVideos]]; [group enumerateAssetsUsingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop) { if (asset) { dic = [[NSMutableDictionary alloc] init]; ALAssetRepresentation *defaultRepresentation = [asset defaultRepresentation]; NSString *uti = [defaultRepresentation UTI]; videoURL = [[asset valueForProperty:ALAssetPropertyURLs] valueForKey:uti]; mpVideoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:videoURL]; NSString *title = [NSString stringWithFormat:@"%@ %lu", NSLocalizedString(@"Video", nil), [assetItems count]+1]; [self performSelector:@selector(imageFromVideoURL)]; [dic setValue:title forKey:@"VideoTitle"];//kName [dic setValue:videoURL forKey:@"VideoUrl"];//kURL AssetBrowserItem *item = [[AssetBrowserItem alloc] initWithURL:videoURL title:title]; [assetItems addObject:item]; [videoURLArray addObject:dic]; NSLog(@"Video has info:%@",videoURLArray); } NSLog(@"Values of dictonary==>%@", dic); //NSLog(@"assetItems:%@",assetItems); NSLog(@"Videos Are:%@",videoURLArray); } ]; } // group == nil signals we are done iterating. else { dispatch_async(dispatch_get_main_queue(), ^{ //[self updateBrowserItemsAndSignalDelegate:assetItems]; // loadImgView.hidden = NO; // [spinner stopAnimating]; // [loadImgView removeFromSuperview]; //selectVideoBtn .userInteractionEnabled = YES; }); } } failureBlock:^(NSError *error) { NSLog(@"error enumerating AssetLibrary groups %@\n", error); }]; } - (UIImage *)imageFromVideoURL { UIImage *image = nil; AVAsset *asset = [[AVURLAsset alloc] initWithURL:videoURL options:nil];; AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset]; imageGenerator.appliesPreferredTrackTransform = YES; // calc midpoint time of video Float64 durationSeconds = CMTimeGetSeconds([asset duration]); CMTime midpoint = CMTimeMakeWithSeconds(durationSeconds/2.0, 600); // get the image from NSError *error = nil; CMTime actualTime; CGImageRef halfWayImage = [imageGenerator copyCGImageAtTime:midpoint actualTime:&actualTime error:&error]; if (halfWayImage != NULL) { // cgimage to uiimage image = [[UIImage alloc] initWithCGImage:halfWayImage]; [dic setValue:image forKey:@"ImageThumbnail"];//kImage NSLog(@"Values of dictonary==>%@", dic); NSLog(@"Videos Are:%@",videoURLArray); CGImageRelease(halfWayImage); } return image; } @end