Objective-C++ / Cocoa attempt to create a window with button, not working?

I'm supposed to create a c++ class with c++ methods, that are made of objective-c and use cocoa, but now I've ran into a problem, and simply can't figure it out, cause I'm pretty new at objective-c. Also the point is that I should be able to create windows and buttons from c++. So when ever I build and run this program, it starts up but then instantly turns into a "not responding" state. Anyways, here's what I got:

Window.h

#ifndef WINDOW_H
#define WINDOW_H

class Window {
    public:
        Window();
        void createButton();
};

#endif

Window.mm

#include "Window.h"
#include "Button.h"

Window::Window(){
    NSWindow *window = [[NSWindow alloc]
        initWithContentRect: NSMakeRect(100, 100, 200, 200)
        styleMask: NSTitledWindowMask | NSMiniaturizableWindowMask
        backing: NSBackingStoreBuffered
        defer: NO];
    [window setTitle: @"Test window"];
}

void Window::createButton(){
    Button *button;
    [[this contentView] addSubView: button];
// word this gives warning: no '-addSubView:' method found
// th开发者_开发问答is is probably causing the problem I have
    }

Button.h

class Button{
    Button();
};
// There will be more methods here eventually

Button.mm

#include "Button.h"
Button::Button(){
    NSButton *button = [[NSButton alloc]
        initWithFrame: NSMakeRect(14, 100, 120, 40)];
    [button setTitle: @"Hello world"];
    [button setAction: @selector(invisible)];
    [button setBezelStyle: NSRoundedBezelStyle];
    [button setButtonType: NSMomentaryLightButton];
    [button setBezelStyle: NSTexturedSquareBezelStyle];
}

Main.cpp

#include "Window.h"
#include "Button.h"

int main(int argc, char *argv[]){
    Window x;
    x.createButton();
}

So, does anyone have any idea why ain't it working, like I mentioned, I'm pretty new at Cocoa and Objective-C, still learning :P And yeah, I've tried to fix it.

[[this contentView] addSubView: button];

As you suspect, that is causing your problem. "This" is not referring to the window; it refers to the class itself. (Remember, your class is not a subclass of an NSWindow)

One option is to declare your NSWindow in the header so it can be used globally. So make your header:

#ifndef WINDOW_H
#define WINDOW_H

class Window {
    public:
        Window();
        void createButton();
        NSWindow *window;
};

#endif

And then change the aforementioned line to:

[[window contentView] addSubview: button]; (Also notice to fix the capitalization on 'addSubview')

It's a similar problem with your button constructor. You are creating an NSButton, but that button is never seen or heard from again.

Your main function is not running the run loop, so the drawing and event handling systems will be non-responsive.

You never show the window you created.

I don't see where you save away the Cocoa objects so that your C++ API can manipulate them. For example, your Window constructor does not save the created window to a member variable, so you will have no way to manipulate that window after its creation.