xcode: TextField.text return nil no matter what is the input: [New Referencing Outlet]?

Question

I have a tab-bar application. In one of the view(.xib), there is a text field and a button. The button supposed to save the text inputted in textField.

However, no matter what i typed, it always read (nil) in textField.text in debug.

When i right click the textField in .xib, i cannot drag the [New Referencing Outlet] to [File's Owner]. i can only drag the [delegate] to [File's Owner]. Does anyone have idea on why i can't do so?

Below the the .h file:

---

@interface AddDebtorViewController : UIViewController
{
    UITextField *tDebtorName;
}

@property (retain, nonatomic) IBOutlet UITextField *tDebtorName;

-(IBAction)returnButPressed:(id)sender;
-(IBAction)addDebtorButPressed:(id)sender;

@end  

---

Below is the .m file:

---

#import "AddDebtorViewController.h"
@implementation AddDebtorViewController
@synthesize tDebtorName;

- (IBAction)addDebtorButPressed:(id)sender
{
    NSString *debtorName = [[NSString alloc] init]; 
    debtorName = tDebtorName.text;
    NSLog(debtorName);
}
...
@end

---

Answer 1

You must select File's Owner, press right button mouse, find your outlet and link it with the ui element.