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    <h3>The simplest solution</h3> <p>Assuming that your app ships with the JavaScript code, and doesn't fetch it over the network, a simple solution is to make your JavaScript code inline instead of an external resource. That is, you can put the contents of <code>code39.js</code> between the <code>&lt;script&gt;</code> tags, just like your other JavaScript code. </p> <p>Of course, this doesn't work very well if you want to add a lot of code, and further complicates your HTML. Your <code>NSString</code> declaration is going to get (even more) unwieldy very quickly!</p> <hr> <h3>Alternative: Add the script as a resource</h3> <p>You can add the JavaScript file as a resource file to be included inside your app bundle. To do this, just add <code>code39.js</code> to your Xcode project.</p> <p>Note that by default, Xcode will add <code>.js</code> files to your "compile sources" build phase. You <strong>don't</strong> want this; you want to treat the file as a resource. Thankfully, it's easy to fix:</p> <ol> <li>Select the top-level project to access its settings.</li> <li>Click on your application target, then choose "Build Phases".</li> <li>Drag your <code>.js</code> file out of the "Compile Sources" section and into the "Copy Bundle Resources" section.</li> </ol> <p>This will ensure that Xcode copies the script file to the "Resources" directory when you build your app.</p> <h3>Finding the script resource's URL</h3> <p>Once your script is included as a resource, you need to find the URL that points to its location on the filesystem. Fortunately, Cocoa makes this pretty easy to do:</p> <pre><code>NSURL* url = [[NSBundle mainBundle] URLForResource:@"code39" withExtension:@"js"]; </code></pre> <p>The <code>url</code> you get back is the absolute URL to the <code>code39.js</code> file inside your app bundle. From there, it should be pretty trivial to insert this URL into another string, like so:</p> <pre><code>NSString* html = [NSString stringWithFormat:@"&lt;script src='%@'&gt;", url]; </code></pre> <p>Once your load your HTML, the <code>UIWebView</code> will have the full URL to your script, and it should execute. This method worked in a test project I just created for iOS 6.0.</p> <hr> <p>(Side note: I strongly suggest keeping your HTML content separate from your source code as well. You can easily adapt the approach above to read the contents of a plain text file into an <code>NSString</code>.)</p>
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