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POYouTube UITableView cells using UIWebView blocking thread?
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  1. POYouTube UITableView cells using UIWebView blocking thread?
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    copied!<p>I have a <code>UITableView</code> which displays YouTube data such as video title and date. I am also displaying a <code>UIWebView</code>(75x75px) for each <code>UITableViewCell</code> which loads an HTML string.</p> <p>here is the pertinent code for <code>- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath</code>:</p> <pre><code>UIWebView *iconView = (UIWebView*)[cell.contentView viewWithTag:2]; [self embedYouTube:videoUrl frame:CGRectMake(0, 0, 75, 75) webView:iconView]; </code></pre> <p>and the <code>embedYouTube</code> function:</p> <pre><code>- (void)embedYouTube:(NSString*)url frame:(CGRect)frame webView:(UIWebView*)webView { if([loadedIconsArray containsObject:webView]) return; NSString *youTubeVideoHTML = @"&lt;html&gt;&lt;head&gt;\ &lt;body style=\"margin:0\"&gt;\ &lt;embed id=\"yt\" src=\"%@\" type=\"application/x-shockwave-flash\" \ width=\"%0.0f\" height=\"%0.0f\"&gt;&lt;/embed&gt;\ &lt;/body&gt;&lt;/html&gt;"; NSString *html = [NSString stringWithFormat:youTubeVideoHTML, url, frame.size.width, frame.size.height]; [webView loadHTMLString:html baseURL:nil]; [loadedIconsArray addObject:webView]; } </code></pre> <p><code>loadedIconsArray</code> is an <code>NSMutableArray</code></p> <p>the problem:</p> <p>When i load up my YouTube view, it seems as though the main thread is blocked while these <code>UIWebView</code> objects are loading the HTML. after a few seconds, everything is working as expected. I notice that i experience this lag only after installing the application for the first time. all other application/view launches work fine.</p> <p>Why am i experiencing this "lag" or thread blocking?</p> <p>How can i avoid it?</p>
 

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