How do I hide a button when an IBAction is performed?

I am attempting to hide开发者_开发问答 a NSButton that performs miniaturize when a different NSButton on the interface is clicked. My attempts thus far have been unsuccessful, this is what I have tried:

.h file:

@interface AppDelegate : NSObject <NSApplicationDelegate> {
    IBOutlet NSWindow *window;
    IBOutlet WebView *webView;
    IBOutlet NSButton *doMinimize;
}

@property (assign) IBOutlet NSWindow *window;
@property (assign) IBOutlet NSButton *button;
@property (nonatomic, retain) IBOutlet WebView *webView;

.m file:

@implementation AppDelegate

@synthesize window;
@synthesize webView;
@synthesize doMinimize;

- (IBAction)toggleFullscreen:(id)sender
{
...

[doMinimize setEnabled:NO];
[doMinimize setTransparent:YES];

...
}

It appears that no matter in what action I try to disable and make the button transparent, it doesn't seem to respond to anything. Do I have to give the button it's own class to make this work? If so, how would I then be able to modify that button from an IBAction inside of a different class?

I apologize in advance if my question is silly, I'm relatively new to the world of Objective-C and am just now starting to get my feet wet.

Thanks in advance.

Have you tried -setHidden:?

[doMinimize setHidden:YES];