Tell me more ×
Stack Overflow is a question and answer site for professional and enthusiast programmers. It's 100% free, no registration required.
up vote 1 down vote favorite

I'm learning iPhone Dev and I'm stuck on something. I'm writing a simple calculator program, but when I try to connect one of the buttons on the calculator to the File Owner in Interface Builder I do not get any options:

.h file

@interface CalculatorViewController : UIViewController
{

    CalculatorBrain *brain;
    IBOutlet UILabel *label;

}

- (IBAction)digitPressed:(UIButton *)sender;

- (IBAction)operandPressed:(UIButton *)sender;
@end

.m file

#import "CalculatorViewController.h"

@implementation CalculatorViewController

- (IBAction)digitPressed:(UIButton *)sender
{
    //not implemented yet
}

- (IBAction)operandPressed:(UIButton *)sender
{
    //not implemented yet
}
@end

As far as I understand when I'm working with my CalculatorViewController.xib in interface builder if I try to connect a button to the file's owner I should have two options: 1. digitPressed 2. operandPressed

However, I do not get any options. Any ideas what I'm doing wrong?

Thanks.

share|improve this question
try changing (UIButton *)sender to just (id)sender – Eimantas Sep 18 '11 at 19:42

3 Answers

up vote 3 down vote accepted
  • Check that file's owner is set to CalculatorViewController
  • In IB, click the button, then click the option on the far right (connections, I think it is called)
  • Find the action called touchUpInside. Drag from the circle next to this to your files owner, the two actions will pop up then.
share|improve this answer
"You can't go directly from the button, you need to specify which type of touch event is linked to the action." - Yes you can, it defaults to touchUpInside. – Jim Sep 18 '11 at 21:29
@Jim : every day's a school day, thanks! – jrturton Sep 18 '11 at 21:34
This doesn't work – Tony Sep 20 '11 at 1:46
What version of Xcode are you using? – jrturton Sep 20 '11 at 5:12
Sorry, you've already said it's v4. Can you give more detail than "not working?" – jrturton Sep 20 '11 at 5:33
show 3 more comments
up vote 0 down vote

I encountered a similar issue. The problem was that I renamed the ViewController. The XIB file has the name of the view controller inside of it.

when it doesn't match the actual name of the UI View Controller class interface builder will act funny.

To fix it, open the XIB file as source code (right click it and use Open As source code) it's an XML file. find the name of the old controller and then change it to the correct name. I found it in the XML under:

<dictionary class="NSMutableDictionary" key="flattenedProperties">
    <string key="-1.CustomClassName">xxxxxxViewController</string>
share|improve this answer
up vote 0 down vote

Are you dragging from the button to the owner or the other way around?

If you want to refer to an object in a nib from code, then you define an IBOutlet and drag from the owner to the object.

If you want to refer to code from an object in a nib file, then you define an IBAction and drag from the object to the owner.

share|improve this answer
I'm dragging from the button to the file owner's – Tony Sep 20 '11 at 1:47

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.