I'm making a couple of buttons programmatically and trying to set an action to each but I can't seem to get it to work.

In my AppController.h I have this code: 

...
IBOutlet NSButton* btnZoomIn;
IBOutlet NSButton* btnZoomOut;
...

and

- (IBAction) zoomIn : (id) sender; 

- (IBAction) zoomOut : (id) sender;

and in AppController.m within the awakeFromNib method: 

/*zoom in and out buttons*/

//get the path to the image files
NSString* zoomInImgPath = [[NSBundle mainBundle] pathForResource:@"zoomIn" ofType:@"png"];
NSString* zoomOutImgPath = [[NSBundle mainBundle] pathForResource:@"zoomOut" ofType:@"png"];

//declare the NSImages
zoomInImg = [[NSImage alloc] initWithContentsOfFile:zoomInImgPath];
zoomOutImg = [[NSImage alloc] initWithContentsOfFile: zoomOutImgPath];

//button making!
//zoomIn
btnZoomIn = [[NSButton alloc] initWithFrame:NSMakeRect(1426.0, 920.0, 25.0, 25.0)];
[btnZoomIn setButtonType:NSMomentaryPushInButton];
[btnZoomIn setTitle:@""];
[btnZoomIn setToolTip:@"Zoom In"];
[btnZoomIn setImage:zoomInImg];
[btnZoomIn setAction:@selector(zoomIn:)];
[[mainWin contentView] addSubview:btnZoomIn];

//zoomOut
btnZoomOut = [[NSButton alloc] initWithFrame:NSMakeRect(1456.0, 920.0, 25.0, 25.0)];
[btnZoomOut setButtonType:NSMomentaryPushInButton];
[btnZoomOut setTitle:@""];
[btnZoomOut setToolTip:@"Zoom Out"];
[btnZoomOut setImage:zoomOutImg];
[btnZoomOut setAction:@selector(zoomOut:)];
[[mainWin contentView] addSubview:btnZoomOut];

and 

- (IBAction) zoomIn : (id) sender  { 
    NSLog(@"zoom in!");
 }

 - (IBAction) zoomOut : (id) sender { 
    NSLog(@"zoom out!");
 }

but zoomOut and zoomIn do not get hit...

objective-c cocoa nsbutton
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