未捕获异常:未定义ReferenceError：'NSApplication‘

Question

下面显示的代码给出了一个exeption

#import <Foundation/Foundation.h>
#import <AppKit/AppKit.h>

@interface Main : NSObject { }
@end
@implementation Main
+(void)main
{
  NSLog(@"Hello world!");
  NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
  NSApplication *anApplication = nil;
  NSArray *screenArray = nil;               
  NSEnumerator *screenEnumerator = nil;
  NSScreen *aScreen = nil;
  NSWindowDepth *depths = null;//remove const
  BOOL exactMatch = NO;

  anApplication = [NSApplication sharedApplication];
  screenArray = [NSScreen screens];
  screenEnumerator = [screenArray objectEnumerator];
}
@end

我正在使用windows，请访问下面的链接qckapp.com/index.html?p=ObjC

Answer 1

您不能使用http://qckapp.com/index.html?p=ObjC完成此操作

只需通过编译器http://www.gnustep.org

Answer 2

您的编译器没有ui功能，您只需使用http://qckapp.com/index.html?p=ObjC作为基本功能

祝好运。