CODEWITHSUNDEEP
objective-c++nsworkspace
user1634189
user1634189

Reputation: 71

NSWorkspacedidmountNotify/probably generic NSWorkspace

I'm an experience C/C++ programmer but new to ObjC++. I'm trying to catch the NSWorkspacedidmountnofification in a Mac OSX project.

I added my callback to my app delegate interface. 

- (void)mediaMounted:(NSNotification *)notification;

The implementation includes

- (void)mediaMounted:(NSNotification *)aNotification {
    NSLog(@"mediaMounted volume change.");
}

In my applicationDidFinishLaunching, I add myself to the notification center.

NSNotificationCenter* ncenter = [[NSWorkspace sharedWorkspace] notificationCenter];
[ncenter addObserver: self
            selector: @selector(mediaMounted)
                name: NSWorkspaceDidMountNotification
              object: nil];

However, when I run and mount the disk, I see:

 2012-08-29 09:52:31.753 OSN[2203:903] -[OSNAppDelegate mediaMounted]: unrecognized selector sent to instance 0x101340af0
 2012-08-29 09:52:31.756 OSN[2203:903] -[OSNAppDelegate mediaMounted]: unrecognized selector sent to instance 0x101340af0

I confirmed that Instance 0x101340af0 is my OSNAppDelegate self, but I don't understand what else I need to do so the selector is recognized.

Upvotes: 4

Views: 410

Answers (1)

Josh
Josh

Reputation: 12566

Your selector should be:

mediaMounted: not mediaMounted.

Your implementation takes an NSNotification as a parameter, not nothing.

You can verify your selector via:

if( [self respondsToSelector:@selector(mediaMounted)] )
{
  NSLog(@"Good to go");
}

Example:

// this selector
@selector(test)

// will call this method
- (void)test{ }

// but this selector, noting the :
@selector(test:)

// would call this method
- (void)test:(id)sender{ }

You can read about selectors here.

Upvotes: 2

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