Creating an OSX application without Xcode - xcode

Question

I'm very new to OS X, and I'm trying to create a simple application without Xcode. I did found some other sites doing that, but I cannot attach event handlers to my button.
below is the code (crafted from other sites). It creates a window and a button, but I don't know how to attach that event to the button:
#import <Cocoa/Cocoa.h>
#interface myclass
-(void)buttonPressed;
#end
#implementation myclass
-(void)buttonPressed {
NSLog(#"Button pressed!");
//Do what You want here...
NSAlert *alert = [[[NSAlert alloc] init] autorelease];
[alert setMessageText:#"Hi there."];
[alert runModal];
}
#end
int main ()
{
[NSAutoreleasePool new];
[NSApplication sharedApplication];
[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
id menubar = [[NSMenu new] autorelease];
id appMenuItem = [[NSMenuItem new] autorelease];
[menubar addItem:appMenuItem];
[NSApp setMainMenu:menubar];
id appMenu = [[NSMenu new] autorelease];
id appName = [[NSProcessInfo processInfo] processName];
id quitTitle = [#"Quit " stringByAppendingString:appName];
id quitMenuItem = [[[NSMenuItem alloc] initWithTitle:quitTitle
action:#selector(terminate:) keyEquivalent:#"q"] autorelease];
[appMenu addItem:quitMenuItem];
[appMenuItem setSubmenu:appMenu];
id window = [[[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 200, 200)
styleMask:NSTitledWindowMask backing:NSBackingStoreBuffered defer:NO]
autorelease];
[window cascadeTopLeftFromPoint:NSMakePoint(20,20)];
[window setTitle:appName];
[window makeKeyAndOrderFront:nil];
int x = 10;
int y = 100;
int width = 130;
int height = 40;
NSButton *myButton = [[[NSButton alloc] initWithFrame:NSMakeRect(x, y, width, height)] autorelease];
[[window contentView] addSubview: myButton];
[myButton setTitle: #"Button title!"];
[myButton setButtonType:NSMomentaryLightButton]; //Set what type button You want
[myButton setBezelStyle:NSRoundedBezelStyle]; //Set what style You want
[myButton setAction:#selector(buttonPressed)];
[NSApp activateIgnoringOtherApps:YES];
[NSApp run];
return 0;
}

Answer 1

First of all, don't avoid Xcode because you are a beginner. Being a beginner is one of the many reasons to use Xcode. Resorting to fully-manually-implemented code like what you have is a naive way to develop applications for OS X and you'll only encounter far more difficulties than it is worth, especially for anything non-trivial.
Having said that, the reason your button isn't doing anything is because the button doesn't have a target. All actions require a target. In your case, you want to create an instance of your myclass class (note that class names in Objective-C are conventionally named in upper camelcase, i.e. MyClass). Note that also your action method should take an argument (which is the sender of the action), even if it is unused.
- (void) buttonPressed:(id) sender
{
NSLog(#"Button pressed!");
//Do what You want here...
NSAlert *alert = [[[NSAlert alloc] init] autorelease];
[alert setMessageText:#"Hi there."];
[alert runModal];
}
// ...
myclass *mc = [[myclass alloc] init];
[myButton setTarget:mc];
[myButton setAction:#selector(buttonPressed:)];
I can't stress enough how ridiculous all of this code is. Bite the bullet and dive into Xcode!