how to create two button with individual events through IB in iphone

in my application i will create 3 subclass. when i press one subclass button it wil goes navigate to next page and another page is navigate to another page. in last subclass when i press the button wants to go next page, it contain errors and it n开发者_运维问答ot goes to another page. i develop designs thru IB. but it shows Program received signal: “EXC_BAD_ACCESS” in console page. what i do here.? anyone pls help..

my code

@interface Navigate : UIViewController {
UILabel *label;
}
@property (nonatomic,retain) IBOutlet UILabel *label;
- (IBAction)myButtonPressed:(id)sender; 
@end

implementation page:
- (void)viewDidLoad {
[super viewDidLoad];
 }
 - (IBAction)myButtonPressed:(id)sender
 {
 label.text=@"Hello World";
 }

i cant procede this page. pls help me.

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May be you have released something.or you are accessing the Null Pointer

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first you create a object of class to which you want to display and use this classVC *_obj=[[classVC alloc]initWithNibName:@"classNibname" bundle:nil]; [self presentmodelviewcontroller:_obj animated:YES];

Use this to go to another view