YouTube視頻GData API

Question

我試圖讓YouTube在我的iOS應用程序中運行。我正在成功檢索特定用戶的視頻列表，但我努力實現didSelectRowAtIndexPath，以便將所選視頻嵌入到單獨的viewController中。這裏是我遇到的麻煩的代碼：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
DetailViewController *detailController = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailController"]; 

    GDataEntryBase *entry2 = [[feed entries] objectAtIndex:indexPath.row]; 
    videoArray = [[(GDataEntryYouTubeVideo *)entry2 mediaGroup] mediaContents]; 
    NSString *tempUrl = [videoArray objectAtIndex:0]; 
    NSLog(@"The URL is:%@",tempUrl); 
    detailController.videoString = tempUrl; 

    [self.navigationController pushViewController:detailController animated:YES]; 

} 

我每次運行此，我得到一個斷點「detailController.videoString = tempUrl;」

我能看到tempUrl字符串被填充通過的NSLog如下：

The URL is:GDataMediaContent 0x69c76a0: {url:https://www.youtube.com/v/s36krFdPmYQ?version=3&f=user_uploads&app=youtube_gdata type:application/x-shockwave-flash medium:video isDefault:true expression:full duration:1913} 

我怎樣才能從API的GData只提取視頻網址？

在此先感謝您的回覆。

我做了以下修改，現在我得到一個正確的URL字符串：

GDataEntryBase *entry2 = [[feed entries] objectAtIndex:indexPath.row]; 
    NSArray *mediaContents = [[(GDataEntryYouTubeVideo *)entry2 mediaGroup] mediaContents]; 
    GDataMediaContent *flashContent = [GDataUtilities firstObjectFromArray:mediaContents withValue:@"application/x-shockwave-flash" forKeyPath:@"type"]; 
    NSLog(@"The URL is:%@",[flashContent URLString]); 
    detailController.videoString = [flashContent URLString]; 

這使我從NSLog的以下內容：

The URL is:https://www.youtube.com/v/s36krFdPmYQ?version=3&f=user_uploads&app=youtube_gdata 

我仍然然而，在獲得一個斷點「 detailController.videoString = [flashContent URLString];

Answer 1

我能解決這個問題。我在兩個ViewControllers之間添加了Modal segue，並稍微修改了我的代碼。下面是我最終加入SEGUE後使用的代碼：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
    DetailViewController *detailController = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailController"]; 
    GDataEntryBase *entry2 = [[feed entries] objectAtIndex:indexPath.row]; 
    NSString *title = [[entry2 title] stringValue]; 
    NSArray *contents = [[(GDataEntryYouTubeVideo *)entry2 mediaGroup] mediaContents]; 
    GDataMediaContent *flashContent = [GDataUtilities firstObjectFromArray:contents withValue:@"application/x-shockwave-flash" forKeyPath:@"type"]; 
    NSString *tempURL = [flashContent URLString]; 

    detailController.videoString = tempURL; 
    detailController.titleString = title; 
    [self.navigationController pushViewController:detailController animated:YES]; 

} 

您可以查看完整的工作YouTubeDemo應用程序代碼在這裏： https://gist.github.com/2501684