ios - 在 iOS 应用程序中保存和显示视频。

Question

我正在开发一个应用程序，用户可以在其中录制视频并将其保存在库/或自定义相册中。我可以创建自定义相册并录制视频并将其保存在默认照片库中，即相机胶卷。但我无法将其保存到自定义相册中。另一件事是相册中保存的视频必须显示在应用程序的 Collection View 中，例如图库 View .. 这样用户就可以点击视频进行播放.. 它可能在 GridView 中/ Collection View 或者可能在 UIImage 应该显示相册中保存的视频的 TableView 中..

这是我在应用开发中用于创建自定义相册的代码部分。

ALAssetsLibrary* libraryFolder = [[ALAssetsLibrary alloc] init];
[libraryFolder addAssetsGroupAlbumWithName:@"HEP" resultBlock:^(ALAssetsGroup *group)
 {
     NSLog(@"Adding Folder:'My Album', success: %s", group.editable ? "Success" : "Already created: Not Success");
 } failureBlock:^(NSError *error)
 {
     NSLog(@"Error: Adding on Folder");
 }];

用于在应用程序中录制视频。

- (IBAction)StartRecord:(id)sender {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    picker.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil];
    [self presentViewController:picker animated:YES completion:NULL];

}

用于将其保存在相册中，即默认相册而不是我创建的自定义相册。

-(BOOL)startMediaBrowserFromViewController:(UIViewController*)controller usingDelegate:(id )delegate {
    // 1 - Validations
    if (([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum] == NO)
        || (delegate == nil)
        || (controller == nil)) {
        return NO;
    }
    // 2 - Get image picker
    UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
    mediaUI.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    mediaUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
    // Hides the controls for moving & scaling pictures, or for
    // trimming movies. To instead show the controls, use YES.
    mediaUI.allowsEditing = YES;
    mediaUI.delegate = delegate;
    // 3 - Display image picker
    [controller presentModalViewController:mediaUI animated:YES];
    return YES;
}

因为我是 iOS 的初学者，还在学习中。我已经搜索了一个月了。所以请帮助我。

Answer 1

首先使用以下代码创建相册文件夹并确保将此代码粘贴到 AppDelegate.m 文件 didFinishLaunchingWithOptions 方法中:

ALAssetsLibrary* libraryFolderSozialConnectVideo = [[ALAssetsLibrary alloc] init];
[libraryFolderSozialConnectVideo addAssetsGroupAlbumWithName:@"HEP" resultBlock:^(ALAssetsGroup *group)
 {
     NSLog(@"HEP Folder Created");
 } failureBlock:^(NSError *error) {
     NSLog(@"Error: Adding on Folder");
 }];

现在，使用以下功能将视频下载到 HEP 文件夹中:

- (void)downloadVideo:(NSURL *)videoURL {
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    NSLog(@"Downloading Started");
    NSData *urlData = [NSData dataWithContentsOfURL:videoURL];
    if (urlData) {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *filePath = [NSString stringWithFormat:@"%@/%@", documentsDirectory,@"thefile.mp4"];
        [urlData writeToFile:filePath atomically:YES];
        dispatch_async(dispatch_get_main_queue(), ^{
            [MBProgressHUD hideAllHUDsForView:self.view animated:YES];
            [self.library saveVideo:[NSURL fileURLWithPath:filePath] toAlbum:@"HEP" completion:^(NSURL *assetURL, NSError *error)
             {
                 NSLog(@"Success downloaded");
             } failure:^(NSError *error) {
                 NSLog(@"Error : %@", [error localizedDescription]);
                 [MBProgressHUD hideAllHUDsForView:self.view animated:YES];
                 [self.navigationController popViewControllerAnimated:YES];
             }];
        });
    }
}); }

对于 didFinishPickingMediaWithInfo 方法中的 videoURL，使用以下代码调用上面的函数:

self.library = [[ALAssetsLibrary alloc] init];
[self downloadVideo:[info valueForKey:UIImagePickerControllerMediaURL]];

我希望这能起作用。 。 .