Creating a custom NSViewController without a nib

Question

I recently started learning Objective-C and I've run into a slight problem. I'm trying to use a custom view controller without a nib, so the view is created in the code. The view controller itself is created in the AppDelegate.

When I run the program, it first displays a default empty window. After I close this window, a second window pops up which correctly contains the view. I obviously don't want that first window to appear, but I don't know what causes it. The only information I could find on this subject was for iOS development, which isn't quite the same.

I also get this message of which I'm not really sure what it means: Could not connect the action orderFrontStandardAboutPanel: to target of class MainViewController

AppDelegate:

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    mainViewController = [[MainViewController alloc] initWithFrame:_window.frame];
    _window.contentView = mainViewController.view;
}

MainViewController:

- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithNibName:nil bundle:nil];
    if (self)
    {
        [self setView:[[MainView alloc] initWithFrame:frame]];
        [self loadView];
    }
    return self;
}

I guess you are calling loadview 2 times. 2. loadview explicitly. The purpose of -loadView is to, uh, load the view. It's called when you access the view controller's view property and the value of that property is nil. In this case, you're accessing self SetView in your initializer, so that's when -loadView gets called. Again you are calling the loadView specifically. This might be one reason you see 1st time empty or as iOS is loading your application it displays loading image. — Siva
– Siva, Commented Jul 26, 2013 at 7:08
Ok great it solved your issue.. Then you can upvote for my comment. — Siva
– Siva, Commented Jul 31, 2013 at 8:56

Sam Soffes · Accepted Answer · 2015-02-05 01:12:18Z

24

In short, override loadView and set self.view to your view. You'll want to give it a frame before you set it.

The default implementation of loadView is where it tries to load the nib. You're intended to override this if you don't want that.

answered Feb 5, 2015 at 1:12

Sam Soffes

15k9 gold badges78 silver badges81 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Jacky Wang Over a year ago

This doesn't work. It crashes at with bad access whenever I try to give it a frame

user376845 Over a year ago

@JackyWang It does work. You need to declare an NSView object inside loadView, then set the frame of that object, then set self.view to your new view object. In other words, never use self.view.anything inside loadView because self.view does not exist yet.

RickJansen Over a year ago

Note this has changed with macOS 10.10, see the doc for NSViewController.

Collectives™ on Stack Overflow

Creating a custom NSViewController without a nib

1 Answer 1

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related