Question

I have a UIWebView in a navigation controller. It pulls html from an xml file and then displays the html. The html contains code to grab local images via <img src="image.png" />. On the iPhone Simulator, the UIWebView displays the text and images at the same time. However, there is a big delay on the iPad:

A few seconds later the images load:

How can I get rid of this nasty delay?

Code:

NSString *html = [NSString stringWithFormat:@"Blah blah %@ <img src='image.png'> %@", [self.questionsAndAnswers objectAtIndex:0], [self.questionsAndAnswers objectAtIndex:1]];
[webView loadHTMLString:html baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]];

The UIWebView is connected via Storyboard.

Edit: despite my comments, this actually happens with any image. I even tried loading it into a basic UIWebView with no other html!

Answer 1

A few things to try:

• Preload the html (useful if you don’t have to generate any of it on the fly)
• Preload the image (in order to cache it)
• Make sure caching is off
• Make sure there isn’t a lot of image processing going on (resizing etc)
• Make sure your images aren’t too large (probably anything over 100k should be checked
• If all else fails, try to make a minimal example by slowly removing parts or by rebuilding the view piece by piece