Question

I’m having trouble accessing some variables in my program.

I have one class called MainMenu.

In the .h file I have declared 2 properties as follows:

MainMenu.h:
@property (nonatomic, retain) IBOutlet NSView *mainView;
@property (nonatomic, retain) IBOutlet NSWindow *theMainWindow;

In another class file, I want to be able to access these 2 variables, current I am using the following code in the other .h class file which does not work, I don’t understand what I’m doing wrong:

AppDelegate.m:
MainMenu *theMainMenu = [[MainMenu alloc] init];
[theMainMenu switchViews:theMainMenu.theMainWindow:theMainMenu.mainView];

Here I create an object of the MainMenu class, and invoke a method called ‘switchViews’ in its definition, I then want to pass it the 2 variables which I’m having trouble accessing.

Any help greatly appreciated.
Thanks in advance everyone.

EDIT: ‘switchViews’ method shown below:

- (void)switchViews:(NSWindow*)mainWindow:(NSView*)newView {
    NSView *dummyView;
    [mainWindow setContentView:dummyView];
    [mainWindow setContentSize:newView.frame.size];
    [mainWindow setContentView:newView];
}

Answer 1

I think the problem is one of 2 different instances of your MainMenu class. If you hooked up your IBOutlets, you must have a blue cube in IB set to your MainMenu class, correct? However, when you alloc init one in your app delegate, that creates another instance of MainMenu that doesn’t have those properties connected to anything. Instead, you should also have a blue cube in IB set to your app delegate, and have an IBOutlet in that class that you connect to the MainMenu blue cube in IB.