Storyboardのsegueでパラメタ受け渡したった ref: http://qiita.com/neiraza/items/6eba4e57dffa993b4933

FirstViewController.m

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"openChatView"]) {
        SecondViewController *controller = segue.destinationViewController;
        controller.name = @"neiraza";
    }
}

SecondViewController.h

@interface SecondViewController : UIViewController
@property (nonatomic, strong) NSString *name;
@end

SecondViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"name %@", self.name);    
}