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PODelay in loading a HTML string into a UIWebView
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  1. PODelay in loading a HTML string into a UIWebView
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    copied!<p>I have two view controllers inside a navigation controller. The 1st view controller has a menu with a button. Pressing this button moves to the 2nd view controller and loads a html string into a UIWebView. Nothing else is being loaded to the webview, just a simple NSString with html code in it. Essentially I'm making a flip card (two views) with the webview as a subview of one of the uiviews.</p> <p>Here's the code:</p> <pre><code>containerView = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 280, 280)]; [self.view addSubview:containerView]; frontView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 280, 280)]; frontView.layer.cornerRadius = 10; frontView.layer.masksToBounds = YES; [frontView setBackgroundColor:[UIColor whiteColor]]; backView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 280, 280)]; backView.layer.cornerRadius = 10; backView.layer.masksToBounds = YES; [backView setBackgroundColor:[UIColor yellowColor]]; [containerView addSubview:frontView]; webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 280, 280)]; webView.scalesPageToFit = YES; webView.userInteractionEnabled = NO; NSString *htmlString = @"&lt;head&gt;&lt;meta name='viewport' content='width=device-width;'&gt;&lt;style type='text/css'&gt;html,body {margin: 0;padding: 0;width: 100%;height: 100%;}html {display: table;}body {display: table-cell;vertical-align: middle;padding: 20px;text-align: center;-webkit-text-size-adjust: none;}&lt;/style&gt;&lt;/head&gt;&lt;ruby&gt;金&lt;rt&gt;きん&lt;/rt&gt;&lt;/ruby&gt;&lt;ruby&gt;曜&lt;rt&gt;よう&lt;/rt&gt;&lt;/ruby&gt;&lt;ruby&gt;日&lt;rt&gt;び&lt;/rt&gt;&lt;/ruby&gt;"; [webView loadHTMLString:htmlString baseURL:nil]; [frontView addSubview:webView]; UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(flip)]; [self.view addGestureRecognizer:tap]; </code></pre> <p>} </p> <p>Issue: I notice that on the first time I press the button to transition to the second view controller that there is a delay in seeing the html string loaded to the webview (it's only about 0.5 - 1 second). This doesn't happen if I go back to the first view controller and hit the button again - this time it's instant.</p> <p>Any ideas what might be causing this first time delay and how to avoid it?</p> <p>Thanks</p>
 

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