我需要在Xcode上为我的UIButton找到一个选择器

Question

我搜索了几天，但我仍然找不到UIButton的选择器。帮助！

在我的视图控制器中。

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
-(IBAction)answer1:(id)sender{
l.text = @"Try again";
}

-(IBAction)answer2:(id)sender{
label.text = @"Yes congratulations";

}

-(IBAction)answer3:(id)sender;{
s.text = @"Try again";
}
-(IBAction)answer3:(id)sender;{
x.text = @"Try again";
}
-(IBAction)button1:(id)sender{
y.(   ) = self.try Again;
}


- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end

我的视图控制器h。

     IBOutlet UILabel *label;

   IBOutlet UILabel *s;
IBOutlet UILabel *l;
IBOutlet UILabel *x;

IBOutlet UIButton *y;

}

-(IBAction)answer1:(id)sender;

-(IBAction)answer2:(id)sender;

-(IBAction)answer3:(id)sender;

-(IBAction)answer4:(id)sender;

-(IBAction)button1:(id)sender;

@end

我想知道我可以在哪里填写选择器空间（括号中的空格）请告诉我你是否知道！