播放列表中的 Youtube GData 视频

Question

美好的一天，我是这个 Youtube GData API 的新手，我在访问特定播放列表的视频列表时遇到问题。

我首先要做的是获取特定用户的播放列表列表。它返回了类似这样的GDataEntryYouTubePlaylistLink 0x888ea20: {v:2.1 title:Playlist Title summary: contentSrc:https://gdata.youtube.com/feeds/api/playlists/PL5......92D127 etag:W/"D04N.....WhJVEU8." authors:1 categories:1 links:related,alternate,self id:tag:youtube.com,2008:user:MyYoutubeUser:playlist:PL5......92D127 countHint:7 unparsed:<media:group>}

我了解到countHint是该播放列表中的视频数量。现在，我想得到这些视频。

我尝试创建一个可以这样做的函数，但我不知道我将使用什么 FeedID：

    GDataServiceGoogleYouTube *service = [self youTubeService];
NSString *feedID = kGDataYouTubeUserFeedIDPlaylists; //this was the feedID i used to get the list of playlist of a user
NSURL *feedURL = [GDataServiceGoogleYouTube youTubeURLForUserID:@"MyYoutubeUser"
                                                        userFeedID:feedID];
[service fetchFeedWithURL:feedURL
                 delegate:self
        didFinishSelector:@selector(request:finishedLoading:error:)];

Answer 1

我能够找到我的问题的解决方案。我希望它也能帮助你。

在我看来，我调用了loadYoutube和loadYoutubePlaylist函数。

• loadYoutube -> 为我们提供了给定用户的 URL 和什么 feedID。就我而言，feedID是kGDataYouTubeUserFeedIDUpload，因为我只想获取用户上传的播放列表和视频。
• loadYoutubePlaylist -> 为我们提供了用户播放列表的 URL。 feedID is kGDataYouTubeUserFeedIDPlaylists
• loadYoutubeVideosPerPlaylist -> 为我们提供了每个播放列表的视频 URL。

代码如下所示：

- (void)loadYoutube
{
    GDataServiceGoogleYouTube *service = [self youTubeService];
    NSString *uploadsID = kGDataYouTubeUserFeedIDUploads;
    NSURL *feedURL = [GDataServiceGoogleYouTube youTubeURLForUserID:@"USERNAME"
                                                         userFeedID:uploadsID];
    NSLog(@"loadYoutube URL: %@", feedURL);
    [service fetchFeedWithURL:feedURL
                     delegate:self
            didFinishSelector:@selector(request:finishedLoadingYoutubeWithFeed:error:)];
}
- (void)loadYoutubePlaylist
{
    GDataServiceGoogleYouTube *service = [self youTubeService];
    NSString *feedID = kGDataYouTubeUserFeedIDPlaylists;
    NSURL *feedURL = [GDataServiceGoogleYouTube youTubeURLForUserID:@"USERNAME"
                                                            userFeedID:feedID];
    NSLog(@"loadYoutubePlaylist URL: %@", feedURL);
    [service fetchFeedWithURL:feedURL
                     delegate:self
            didFinishSelector:@selector(request:finishedLoadingPlaylistWithFeed:error:)];
}
- (void)loadYoutubeVideosPerPlaylist:(NSString *)urlString
{
    GDataServiceGoogleYouTube *service = [self youTubeService];
    NSURL *feedURL = [NSURL URLWithString:urlString];
    NSLog(@"loadYoutubeVideosPerPlaylist URL: %@", feedURL);
    [service fetchFeedWithURL:feedURL
                     delegate:self
            didFinishSelector:@selector(request:finishedLoadingYoutubeVideosPerPlaylistWithFeed:error:)];
}

这是Youtube请求..

#pragma mark - Youtube Requests
- (void)request:(GDataServiceTicket *)ticket finishedLoadingYoutubeWithFeed:(GDataFeedBase *)aFeed error:(NSError *)error
{
}
- (void)request:(GDataServiceTicket *)ticket finishedLoadingPlaylistWithFeed:(GDataFeedBase *)aFeed error:(NSError *)error
{
    if (kGDataYouTubeUserFeedIDPlaylists) {
        self.playlistFeed = (GDataFeedYouTubeVideo *)aFeed;
        NSArray *feedArray = [self.playlistFeed entries];
        for (int i = 0; i < [feedArray count]; i++) {
            GDataEntryBase *entry = [[self.playlistFeed entries] objectAtIndex:i];
            NSString *title = [[entry title] stringValue];
            [playlist addObject:NSLocalizedString(title, @"playlistTitle")];
            NSLog(@"%@", [[entry content] sourceURI]);
            [videoPlaylistURLArray addObject:[[entry content] sourceURI]];
        }
    }
    if (!error) {
        [self addMenuButtons];
        [self setPlaylistIndex:0];
        [SVProgressHUD showSuccessWithStatus:@"Success!"];
    }else{
        [SVProgressHUD showErrorWithStatus:@"Failed Fetching Playlist."];
    }
}
- (void)request:(GDataServiceTicket *)ticket finishedLoadingYoutubeVideosPerPlaylistWithFeed:(GDataFeedBase *)aFeed error:(NSError *)error
{
    self.feed = (GDataFeedYouTubeVideo *)aFeed;
    [self.youtubeTable reloadData];
}