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POHow to handle a custom URL in an already-open app?
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copied!<p><br> I have an app based on the Utility template (i.e. Main and Flip view controllers). The Flip view allows selecting a certain item to be used on the main view. So far - works great.</p> <p>Now I tried adding a custom URL. Something to the effect of: <code>myapp://itemID=40</code> that will basically tell the main view: "no need to flip - you'll be dealing with item 40".</p> <p>I registered the URL type scheme as "<code>myapp</code>" and added the following method to the app delegate:</p> <pre><code>- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url { if (!url) { return NO; } NSString *urlString = [url absoluteString]; NSLog(@"URL received: %@", urlString); NSString *itemID = [urlString stringByReplacingOccurrencesOfString:@"myapp://itemID=" withString:@""]; NSLog(@"Item received: %@", itemID); [_mainViewController setStartupItem:itemID]; return YES; } </code></pre> <p>As you can see, the <code>itemID</code> is set to a property called <code>startupItem</code> in the <code>mainViewController</code>.</p> <p>I then added one line to the regular <code>application</code> method to verify that <code>startupItem</code> will be <code>nil</code> in case of no URL:</p> <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { //Make sure URL string is empty [_mainViewController setStartupItem:nil]; // Override point for customization after application launch. // Add the main view controller's view to the window and display. self.window.rootViewController = self.mainViewController; [self.window makeKeyAndVisible]; return YES; } </code></pre> <p>And in MainViewController.m I added code to handle the item to the <code>viewDidLoad</code> event.</p> <p>And here's my problem: this scheme works great if the app is started from a URL the first time. If it's already running, then we never reach <code>viewDidLoad</code> again and therefore don't handle that particular item, but go on as if none was passed.</p> <p>My humble question is: which <code>UIViewController</code> should I put my handling code in? Or, am I approaching all this the wrong way? Should this be handled in my model?</p> <p>As always, thanks in advance for your time!</p> <p>Guy</p>

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