CODEWITHSUNDEEP
xcodeinterface-builderibactioniboutlet
user445338
user445338

Reputation:

Cannot connect UIButton to ViewController in XCode4

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.

Upvotes: 1

Views: 3256

Answers (3)

Asher
Asher

Reputation: 1867

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>

Upvotes: 0

jrturton
jrturton

Reputation: 119292

  • 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.

Upvotes: 3

Jim
Jim

Reputation: 73966

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.

Upvotes: 0

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