Objective-C environment setup tutorial in Windows

WindowsLowerObjective-CThis document describes how to build an environment.Objective-CFor details about the development environment, see this article.

1. Install four files. Please contact me directly.

2. test:

After the installation is complete, go to "start-Program-GNUstep-Shell". The window that appears is the shell window. You can edit vi/vim) and compile gcc) object-C code.

The default path of this shell is \ home \ <username>, for example,/home/samsung /.

In addition, I directly used devc ++ and UE to edit software editing programs and put them under/home/samsung/for compilation and operation.

The following is my code and running result:

Source code of hello. m:

 
 

  
  
#import <stdio.h> 
  
  
int main(int argc,const char *argv[]){  
  
  
printf("hello world\n");  
  
  
return 0;  
  
  
} 
 
 

Compile and run:

 
 

  
  
samsung@coco ~  
  
  
$ gcc hello.m  
  
  
samsung@coco ~  
  
  
$ ls  
  
  
a.exe  hello.m  
  
  
samsung@coco ~  
  
  
$ ./a.exe  
  
  
hello world  
  
  
samsung@coco ~ 
 
 

3. A more complex example:

Code: contains three files.

(1) Fraction. h:

 
 

  
  
# Import <Foundation/NSObject. h>
  
  
 
  
  
@ Interface Fraction: NSObject {
  
  
Int numerator;
  
  
Int denominator;
  
  
}
  
  
 
  
  
-(Void) print;
  
  
-(Void) setNumerator: (int) d;
  
  
-(Void) setDenominator: (int) d;
  
  
-(Int) numerator;
  
  
-(Int) denominator;
  
  
-(Void) setNumerator: (int) n ddd: (int) d;
  
  
-(Void) setNumerator: (int) n: (int) d :( int);
  
  
// Here, three setNumerator functions are reloaded.
  
  
@ End
 
 

(2) Fraction. m

 
 

  
  
#import "Fraction.h"  
  
  
#import <stdio.h> 
  
  
 
  
  
@implementation Fraction  
  
  
-(void) print {  
  
  
    printf( "%i/%i", numerator, denominator );  
  
  
}  
  
  
 
  
  
-(void) setNumerator: (int) n {  
  
  
    nnumerator = n;  
  
  
}  
  
  
 
  
  
-(void) setDenominator: (int) d {  
  
  
    ddenominator = d;  
  
  
}  
  
  
 
  
  
-(int) denominator {  
  
  
    return denominator;  
  
  
}  
  
  
 
  
  
-(int) numerator {  
  
  
    return numerator;  
  
  
}  
  
  
 
  
  
-(void) setNumerator: (int) n ddd: (int)d {  
  
  
    nnumerator = n;  
  
  
    ddenominator = d;   
  
  
}  
  
  
-(void) setNumerator: (int)n : (int)d :(int) a {  
  
  
        nnumerator = n;  
  
  
        ddenominator = d;  
  
  
        printf("+++++a = %d +++ \n", a);  
  
  
}  
  
  
@end 
 
 

(3) main. m

 
 

  
  
# Import <stdio. h>
  
  
# Import <Foundation/Foundation. h>
  
  
# Import "Fraction. h"
  
  
 
  
  
Int main (int argc, const char * argv []) {
  
  
// Create a new instance
  
  
Fraction * frac = [[Fraction alloc] init];
  
  

  
  

  
  
Int x;
  
  
Int y;
  
  
 
  
  
// Set the values
  
  
[Frac setNumerator: 1];
  
  
[Frac setDenominator: 3];
  
  
 
  
  
// Print it
  
  
Printf ("The fraction is :");
  
  
 
  
  
[Frac print];
  
  
Printf ("\ n ");
  
  
NSLog (@ "hello world !!! \ N "); // OK
  
  

  
  
[Frac setNumerator: 34 ddd: 98];
  
  

  
  
[Frac print];
  
  
Printf ("\ n ");
  
  
NSLog (@ "hello world !!! \ N "); // OK
  
  

  
  
[Frac setNumerator: 44: 55: 66]; // OK
  
  
[Frac print];
  
  
Printf ("\ n ");
  
  

  
  
Scanf ("% d", & x, & y); // test the scanf function, OK
  
  

  
  
[Frac setNumerator: x ddd: y]; // OK
  
  
[Frac print];
  
  
// Free memory
  
  
[Frac release];
  
  
// [Frac release]; // the previous version has been release, so an exception occurs here: the program crashes.
  
  
// Release the NULL pointer. Of course, it is not allowed.
  
  
Return 0;
  
  
}
 
 

Compilation Method:

(1) Compile main. m into main. o:

 
 

  
  
gcc -fconstant-string-class=NSConstantString -c main.m -I /GNUstep/System/Library/Headers 
 
 

2) Compile Fraction. m into Fraction. o:

 
 

  
  
gcc -c Fraction.m -I /GNUstep/System/Library/Headers 
 
 

3) Compile .ointo an executable program named main(the last generation is main.exe)

 
 

  
  
gcc -o main main.o Fraction.o -L /GNUstep/System/Library/Libraries/ -lobjc -lgnustep-base 
 
 

Note: There will be a warning, but you don't need to worry about it. After all, our executable program has been compiled.

Running result:

 
 

  
  
samsung@coco ~/objc/fraction  
  
  
$ ./main.exe  
  
  
The fraction is: 1/3  
  
  
 
  
  
2010-08-13 16:29:01.515 main[1212] hello world!!!  
  
  
34/98  
  
  
 
  
  
2010-08-13 16:29:01.515 main[1212] hello world world!!!  
  
  
+++++a = 66 +++  
  
  
44/55  
  
  
 
  
  
22 33  
  
  
22/33  
  
  
 
  
  
samsung@coco ~/objc/fraction    
 
 

4. Conclusion:

1. You can also use cygwin + GNUstep for development;

2. Objective-C is suffixed with m and compiled using gnu gcc;

3. The entire environment is similar to that of linux;

Summary:WindowsLowerObjective-CThe environment setup tutorial is complete. I hope this article will help you!