objectクラスの作成とクラスの使用

クラス構文は重要です.
student.h

//
//  Student.h
//  stringTest
//
//  Created by wen jing on 12-8-5.
//  Copyright (c) 2012  __MyCompanyName__. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Student : NSObject
{
    int no;
    int age;
    NSString *name;
    

}
@property int no;
@property int age;
@property NSString *name;

- (void) aetstudent:(NSString*)namee;

@end

student.m

//
//  Student.m
//  stringTest
//
//  Created by wen jing on 12-8-5.
//  Copyright (c) 2012  __MyCompanyName__. All rights reserved.
//

#import "Student.h"

@implementation Student

@synthesize no;
@synthesize age;
@synthesize name;

- (void) aetstudent:(NSString *)namee{
    name = namee;

}

@end

//
//  Print.h
//  stringTest
//
//  Created by wen jing on 12-8-5.
//  Copyright (c) 2012  __MyCompanyName__. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Print : NSObject//Objective-c        NSObject 
{
    NSString *caption; 
    
    NSString *photographer; 
}
// Objective-C 2.0       ，      get/set   
@property (nonatomic, copy) NSString *caption; 

@property (nonatomic, copy) NSString *photographer; 
// Objective-C 2.0       ，      get/set   
+ (NSString*)printName; 
@end

//
//  Print.m
//  stringTest
//
//  Created by wen jing on 12-8-5.
//  Copyright (c) 2012  __MyCompanyName__. All rights reserved.
//

#import "Print.h"

@implementation Print
@synthesize photographer; 

@synthesize caption; 



//     

+ (NSString*)printName 

{ 
    
    return (@"Print Result"); 
    
} 
@end

//
//  main.m
//  stringTest
//
//  Created by wen jing on 12-8-4.
//  Copyright (c) 2012  __MyCompanyName__. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Print.h"
#import "Student.h"

int main (int argc, const char * argv[])
{

    @autoreleasepool {
          
        //       
        
        NSLog(@"ClassName = \"%@\"", [Print printName]); 
        
        
        
        //     
        
        Print* p = [[Print alloc] init]; 
        
        //       
        
        [p setCaption:@"MyCaption"]; 
        
        [p setPhotographer:@"MyPhotographer"]; 
        
        
        
        //       
        
        NSLog(@"Caption = \"%@\"", [p caption]); 
    
        NSLog(@"Photographer = \"%@\"", [p photographer]); 
        
       
        Student *student=[[Student alloc] init];
        
        [student setNo:2];
  
        [student setName:@"MrJing"];
        
        NSLog(@"student no=%i",[student no]);
        NSLog(@"student name=%@",[student name]);
        [student aetstudent:@"Mrwang"];
        NSLog(@"student name=%@",[student name]);
        [student release];
        [p release];
        
        /*
         log:
         2012-08-05 01:59:25.775 stringTest[1088:903] ClassName = "Print Result"
         2012-08-05 01:59:25.788 stringTest[1088:903] Caption = "MyCaption"
         2012-08-05 01:59:25.793 stringTest[1088:903] Photographer = "MyPhotographer"
         2012-08-05 01:59:25.798 stringTest[1088:903] student no=2
         2012-08-05 01:59:25.801 stringTest[1088:903] student name=MrJing
         2012-08-05 01:59:25.805 stringTest[1088:903] student name=Mrwang
         
         
         */
         
        
        
    }
    return 0;
}

感慨:コードはできるだけコピーしたり貼り付けたりしないでください.さもないと手書きで間違います