使用 GData 库在 UIWebView 中嵌入 YouTube 视频

发布于 2024-11-17 04:47:11 字数 2482 浏览 7 评论 0 原文

我正在构建一个可以访问特定用户的 YouTube 上传内容的应用程序。为此，我使用 Google 的 GData Objective-C 客户端库。我使用它来访问用户的上传提要并返回 GDataEntryYouTubeVideos 的 NSArray。使用 GDataEntryYouTubeVideo 的 htmlLink 方法，我使用一些特殊的 HTML 代码将 url 加载到 UIWebView 中。然而，UIWebView只显示一个红色页面。

htmlLink 返回的 url 是 https。当我手动将 https 替换为 http 时，视频将按预期加载到 UIWebView 中。以下代码不会加载 YouTube 视频：

- (void)viewDidLoad
{
    [super viewDidLoad];

    GDataServiceGoogleYouTube *youtubeService = [[GDataServiceGoogleYouTube alloc] init];
    NSURL *uploadUrl = [GDataServiceGoogleYouTube youTubeURLForUserID:@"higaara" userFeedID:kGDataYouTubeUserFeedIDUploads];
    void(^handler)(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error) = ^(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error)
    {
        NSLog(@"handler");
        // Get the link from the youtube entry
        GDataEntryYouTubeVideo *youTubeVideo = [feed firstEntry];

        NSString *htmlLinkString = [[youTubeVideo HTMLLink] href];

        // Create an html string to load into the web view
        NSString *htmlString = [NSString stringWithFormat:@"<html><head><meta name =
        \"viewport\" content = \"initial-scale = 1.0, user-scalable = no, width =
        212\"/></head><body style=\"background:#F00;margin-top:0px;margin-
        left:0px\"><div><object width=\"212\" height=\"172\"><param name=\"movie\"
        value=\"%@\"></param><param name=\"wmode\" value=\"transparent\"></param><embed
        src=\"%@\"type=\"application/x-shockwave-flash\" wmode=\"transparent\"
        width=\"212\" height=\"172\"></embed></object></div></body></html>",
        htmlLinkString, htmlLinkString];
        NSURL *tempurl = [NSURL URLWithString:@"http://onnati.net/apptrap"];
        [webView loadHTMLString:htmlString tempurl];
    };

    [youtubeService fetchFeedWithURL:uploadUrl completionHandler:handler];
}

htmlString 中的 html 代码来自此博客文章。

如果我用以下内容替换 htmlLinkString 创建行：

NSString *htmlLinkString = [[[youTubeVideo HTMLLink] href] stringByReplacingOccurrencesOfString:@"https://" withString:@"http://"];

那么 UIWebView 会正确加载视频。

我不确定我在这里缺少什么。 我是否需要做更多的事情才能将 https url 加载到 UIWebView 中？或者 GData 库中是否缺少返回标准非安全 URL 的内容？

原文

I'm building an app that will access a specific user's YouTube uploads. For this, I'm using Google's GData Objective-C client library. I use it to get access to the user's uploads feed and return an NSArray of GDataEntryYouTubeVideos. Using GDataEntryYouTubeVideo's htmlLink method, I load the url into a UIWebView with some special HTML code. However, the UIWebView just shows a red page.

The url that htmlLink returns is an https. When I manually replace https with http, the video loads in the UIWebView as expected. The following code does not load the YouTube video:

- (void)viewDidLoad
{
    [super viewDidLoad];

    GDataServiceGoogleYouTube *youtubeService = [[GDataServiceGoogleYouTube alloc] init];
    NSURL *uploadUrl = [GDataServiceGoogleYouTube youTubeURLForUserID:@"higaara" userFeedID:kGDataYouTubeUserFeedIDUploads];
    void(^handler)(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error) = ^(GDataServiceTicket *ticket, GDataFeedBase *feed, NSError *error)
    {
        NSLog(@"handler");
        // Get the link from the youtube entry
        GDataEntryYouTubeVideo *youTubeVideo = [feed firstEntry];

        NSString *htmlLinkString = [[youTubeVideo HTMLLink] href];

        // Create an html string to load into the web view
        NSString *htmlString = [NSString stringWithFormat:@"<html><head><meta name =
        \"viewport\" content = \"initial-scale = 1.0, user-scalable = no, width =
        212\"/></head><body style=\"background:#F00;margin-top:0px;margin-
        left:0px\"><div><object width=\"212\" height=\"172\"><param name=\"movie\"
        value=\"%@\"></param><param name=\"wmode\" value=\"transparent\"></param><embed
        src=\"%@\"type=\"application/x-shockwave-flash\" wmode=\"transparent\"
        width=\"212\" height=\"172\"></embed></object></div></body></html>",
        htmlLinkString, htmlLinkString];
        NSURL *tempurl = [NSURL URLWithString:@"http://onnati.net/apptrap"];
        [webView loadHTMLString:htmlString tempurl];
    };

    [youtubeService fetchFeedWithURL:uploadUrl completionHandler:handler];
}

The html code in htmlString is from this blog post on YouTube's API blog.

If I replace the htmlLinkString creation line with this:

NSString *htmlLinkString = [[[youTubeVideo HTMLLink] href] stringByReplacingOccurrencesOfString:@"https://" withString:@"http://"];

then the UIWebView properly loads the video.

I'm not sure what I'm missing here. Do I need to do something more in order to load an https url into a UIWebView? Or is there something I'm missing in the GData library that returns a standard non-secure URL?