iOSからFacebook APIを使ってWallに投稿するには：書籍転載：Facebook SDK for iOSアプリ開発ガイド（2）（1/3 ページ）

#import <UIKit/UIKit.h>
#import "Facebook.h"
#import "FBLoginDialog.h"
#import "LoginButton.h"
#import "JSON.h"
 
@interface HelloFbViewController : UIViewController <FBSessionDelegate, FBRequestDelegate, 
UITextFieldDelegate> {
    
    IBOutlet LoginButton *loginButton;
    IBOutlet UIView *loggedInView;
    IBOutlet UITextField *messageField;
    
    Facebook *facebook;
}
@property(readonly) Facebook *facebook;
 
-(IBAction) postMessage: (id) sender;
 
-(IBAction) login: (id) sender;
 
@end

#import "HelloFbViewController.h"
 
@implementation HelloFbViewController
@synthesize facebook;
 
static NSString* APPLICATION_ID = @"XXXXXXXXXXXX";
 
- (void)viewDidLoad {
    [super viewDidLoad];
    [loggedInView setHidden:YES]; ////書き込み用のUI群をはじめは隠す
    [messageField setDelegate:self];
    facebook = [[Facebook alloc] initWithAppId: APPLICATION_ID];
    [facebook setSessionDelegate:self];
}
 
-(IBAction) login: (id) sender {
    if (!loginButton.loggedIn) {
        NSArray *permissions =  [[NSArray arrayWithObjects:
                              @"read_stream",@"publish_stream",nil] retain];
        [facebook authorize:permissions delegate:self];
    } else {
        [facebook logout:self];
        
    }
}
- (void)fbDidLogin {
    NSLog(@"HelloFbViewController.fbDidLogin");
    [loginButton setLoginStatus:YES];
    [loggedInView setHidden:NO];
}
 
- (void)fbDidNotLogin:(BOOL)cancelled {    
    [loginButton setLoginStatus:NO];
    [loggedInView setHidden:YES];
}
 
- (void)fbDidLogout {    
    NSLog(@"HelloFbViewController.fbDidLogout");
    [loginButton setLoginStatus:NO];
    [loggedInView setHidden:YES];
}
 
//キーボードを隠す
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [messageField resignFirstResponder];
    return YES;
}
 
-(IBAction) postMessage: (id) sender {
    
    NSDictionary *privacy = [[[NSDictionary alloc] initWithObjectsAndKeys:
                              @"CUSTOM",@"value",
                              @"SELF",@"friends",
                              nil]autorelease];
    
    NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                   messageField.text,  @"message",
                                   [privacy JSONRepresentation], @"privacy",
                                   nil];
    [facebook requestWithGraphPath:@"/me/feed"
            andParams:params
            andHttpMethod:@"POST"
            andDelegate:self];
}
 
- (void)request:(FBRequest *)request didReceiveResponse:(NSURLResponse *)response {
    NSLog(@"HelloFbViewController.didReceiveResponse");
};
 
- (void)request:(FBRequest *)request didLoad:(id)result {
    NSLog(@"HelloFbViewController.didLoad");
    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"Success"
                          message:[NSString stringWithFormat:@"id=%@",
                                  [result objectForKey:@"id"]]
                          delegate:self
                          cancelButtonTitle:@"OK"
                          otherButtonTitles: nil];
    [alert show];
    [alert release];
    [messageField setText:@""];
}
 
- (void)request:(FBRequest *)request didFailWithError:(NSError *)error {
    NSLog(@"HelloFbViewController.didFailWithError %@", error);
};
 
- (void)dealloc {
    [messageField release];
    [loginButton release];
    [super dealloc];
}
 
@end