第一个GNUstep窗口程序

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#include "AppController.h"
#include <AppKit/AppKit.h>

int main(int argc, const char *argv[])
{
   NSAutoreleasePool *pool;
   AppController *delegate;

   pool = [[NSAutoreleasePool alloc] init];
   delegate = [[AppController alloc] init];

   [NSApplication sharedApplication];
   [NSApp setDelegate: delegate];

   RELEASE(pool);
   return NSApplicationMain (argc, argv);
}

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#ifndef _AppController_H_
#define _AppController_H_

#include <Foundation/NSObject.h>

@class NSWindow;
@class NSTextField;
@class NSNotification;

@interface AppController : NSObject
{
   NSWindow *window;
   NSTextField *label;
}

- (void)applicationWillFinishLaunching: (NSNotification *) not;
- (void)applicationDidFinishLaunching: (NSNotification *) not;

@end

#endif /* _AppController_H_ */

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#include "AppController.h"
#include <AppKit/AppKit.h>

@implementation AppController
- (void) applicationWillFinishLaunching: (NSNotification *) not
{
   /* Create Menu */
   NSMenu *menu;
   NSMenu *info;

   menu = [NSMenu new];
   [menu addItemWithTitle: @"Info"
                   action: NULL
            keyEquivalent: @""];
   [menu addItemWithTitle: @"Hide"
                   action: @selector(hide:)
            keyEquivalent: @"h"];
   [menu addItemWithTitle: @"Quit"
                   action: @selector(terminate:)
            keyEquivalent: @"q"];

   info = [NSMenu new];
   [info addItemWithTitle: @"Info Panel..."
                   action: @selector(orderFrontStandardInfoPanel:)
            keyEquivalent: @""];
   [info addItemWithTitle: @"Preferences"
                   action: NULL
            keyEquivalent: @""];
   [info addItemWithTitle: @"Help"
                   action: @selector (orderFrontHelpPanel:)
            keyEquivalent: @"?"];

   [menu setSubmenu: info
            forItem: [menu itemWithTitle:@"Info"]];
   RELEASE(info);

   [NSApp setMainMenu:menu];
   RELEASE(menu);

   /* Create Window */
   window = [[NSWindow alloc] initWithContentRect: NSMakeRect(300, 300, 200, 100)
                                        styleMask: (NSTitledWindowMask |
                                                    NSMiniaturizableWindowMask |
                                                    NSResizableWindowMask)
                                          backing: NSBackingStoreBuffered
                                            defer: YES];
   [window setTitle: @"Hello World"];

   /* Create Label */
   label = [[NSTextField alloc] initWithFrame: NSMakeRect(30, 30, 80, 30)];
   [label setSelectable: NO];
   [label setBezeled: NO];
   [label setDrawsBackground: NO];
   [label setStringValue: @"Hello World"];

   [[window contentView] addSubview: label];
   RELEASE(label);
}

- (void) applicationDidFinishLaunching: (NSNotification *) not
{
   [window makeKeyAndOrderFront: self];
}

- (void) dealloc
{
  RELEASE(window);
  [super dealloc];
}

@end

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{
   ApplicationDescription = "Hello World Tutorial";
   ApplicationIcon = "";
   ApplicationName = HelloWorld;
   ApplicationRelease = 0.1;
   Authors = "";
   Copyright = "Copyright (C) 200x by ...";
   CopyrightDescription = "Released under...";
   FullVersionID = 0.1;
   URL = "";
}

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#GNUSTEP_MAKEFILES=/usr/share/GNUstep/Makefiles
GNUSTEP_MAKEFILES=$(shell gnustep-config --variable=GNUSTEP_MAKEFILES)
include $(GNUSTEP_MAKEFILES)/common.make

APP_NAME = HelloWorld
HelloWorld_HEADERS = AppController.h
HelloWorld_OBJC_FILES = main.m AppController.m
HelloWorld_RESOURCE_FILES = HelloWorldInfo.plist

include $(GNUSTEP_MAKEFILES)/application.make

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make
openapp ./HelloWorld.app