How to handle with a default URL scheme

Question

I want to build URI (or URL scheme) support in my app.

I do a LSSetDefaultHandlerForURLScheme() in my + (void)initialize and I setted the s

Answer 1

As you are mentioning AppleScript, I suppose you are working on Mac OS X.

A simple way to register and use a custom URL scheme is to define the scheme in your .plist:

CFBundleURLTypes

    
        CFBundleURLName
        URLHandlerTestApp
        CFBundleURLSchemes
        
            urlHandlerTestApp
        
    

To register the scheme, put this in your AppDelegate's initialization:

[[NSAppleEventManager sharedAppleEventManager]
    setEventHandler:self
        andSelector:@selector(handleURLEvent:withReplyEvent:)
      forEventClass:kInternetEventClass
         andEventID:kAEGetURL];

Whenever your application gets activated via URL scheme, the defined selector gets called.

A stub for the event-handling method, that shows how to get the URL string:

- (void)handleURLEvent:(NSAppleEventDescriptor*)event
        withReplyEvent:(NSAppleEventDescriptor*)replyEvent
{
    NSString* url = [[event paramDescriptorForKeyword:keyDirectObject]
                        stringValue];
    NSLog(@"%@", url);
}

Apple's documentation: Installing a Get URL Handler

Update I just noticed a problem for sandboxed apps that install the event handler in applicationDidFinishLaunching:. With enabled sandboxing, the handler method doesn't get called when the app is launched by clicking a URL that uses the custom scheme. By installing the handler a bit earlier, in applicationWillFinishLaunching:, the method gets called as expected:

- (void)applicationWillFinishLaunching:(NSNotification *)aNotification
{
    [[NSAppleEventManager sharedAppleEventManager]
        setEventHandler:self
            andSelector:@selector(handleURLEvent:withReplyEvent:)
          forEventClass:kInternetEventClass
             andEventID:kAEGetURL];
}

- (void)handleURLEvent:(NSAppleEventDescriptor*)event
        withReplyEvent:(NSAppleEventDescriptor*)replyEvent
{
    NSString* url = [[event paramDescriptorForKeyword:keyDirectObject]
                        stringValue];
    NSLog(@"%@", url);
}

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On the iPhone, the easiest way to handle URL-scheme activation is, to implement UIApplicationDelegate's application:handleOpenURL: - Documentation