undeclared navigation object?

already i am declared navigation object like this

UINavigationController *naviButtonpro;

@property (nonatomic, retain) IBOutlet UINavigationController *naviButtonpro;

and also declared @synthesize naviButtonpro;

self.naviButtonpro = [[UINavigationController alloc] initWithNibName:@"NaviButtonViewController" bundle:nil];
[self.window addSubview:self.naviButtonpro.view];

when i am using this method

-(IBAction)displayNextPage:(id)sender
{
    dispNext *gotoback = [[dispNext alloc] initWithNibName:@"dispNextView" bundle:[NSBundle mainBundle]];
    //UINavigationController *naviButtonpro = [[UINavigationController alloc] initWithNibName:@"NaviButtonViewController" bundle:nil];
    [self.naviButtonpro pushViewController:gotoback animated:YES];
    [gotoback release];
}

i am geting an error like this Request for member 'naviButtonpro' in something not a structure or union

can u tell me the how to resol开发者_Python百科ve this problem

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2 things to note here.

Firstly, you aren't creating a UINavigationController. You need to alloc init it. You seem to have it in the code but its commented out.

Secondly, dispNext needs to subclass & inherit from UIViewController. Does it do this?

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The first problem is where you are initializing the 'naviButtonpro' and second is What kind of the class its inherited of your interface class ? is it UIView or UIViewController.