iPhone Dev: UIWebView baseUrl to resources in Documents folder not App bundle

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After some googling I have finally found a fitting solution for the question I posed. Hopefully this would help those who face the same problem.

The trick is with the formatting of the string path when creating an NSURL object for baseURL of a UIWebView. Although usually I use the typical “Users/…../dir/file” in most cases, loading using UIWebView’s loadHTMLString:baseURL needs a different approach.

As described in http://dblog.com.au/iphone-development/loading-local-files-into-uiwebview/, where I got the solution, string path to the resources just needs to have slashes to be replaced with double-slashes and spaces with %20:

NSString *imagePath = [[NSBundle mainBundle] resourcePath];
imagePath = [imagePath stringByReplacingOccurrencesOfString:@"https://stackoverflow.com/" withString:@"//"];
imagePath = [imagePath stringByReplacingOccurrencesOfString:@" " withString:@"%20"];

NSString *HTMLData = @"
<h1>Hello this is a test</h1>
<img src="https://stackoverflow.com/questions/1926117/sample.jpg" alt="" width="100" height="100" />";
[webView loadHTMLString:HTMLData baseURL:
           [NSURL URLWithString: 
           [NSString stringWithFormat:@"file:/%@//",imagePath]
           ]];

Do take note of the replacing of the strings and also the:

[NSString stringWithFormat:@"file:/%@//",imagePath]

Although the example code above is retrieving the path to the mainBundle of the application, it can also work in other folders, ie Documents(and its subfolders) as I did in mine.

Kind regards,
oonoo

PS Thanks again Nic for the reply 🙂

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