Question

I dragged an action to the ViewController.h area (which is my dayNight button), as shown:

//
//  ViewController.h
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

- (IBAction)dayNight:(id)sender;
- (IBAction)insulationClick:(id)sender;

Now I decide I want it to read:

- (IBAction)dayNightClick:(id)sender;

So I rename it manually as shown in above line. I also rename it in the ViewController.m file from:

- (IBAction)dayNight:(id)sender{}

to:

- (IBAction)dayNightClick:(id)sender{}

When I execute the code I get an error as soon as I use my button.

If I manually rename it (without the word Click) it works again.

Why can’t I manually modify the code line. Is there another location where I must rename the code too?

The error is:

Thread1: signal SIGABRT

and points to this line of code in the main.m file:

int main(int argc, char *argv[])
{
@autoreleasepool 
{
    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}

I’m sure this is a really basic question.

Answer 1

What I discovered is the following:

• Go to the story board (ie the view where you can see your GUI representation of your idevice)
• Click on the button you wish to rename (we are going to delete it)
• Click the button called “Show the connections inspector” (located near top right hand corner of xcode, and looks like a right pointing arrow in a black circle).
• There is a section called “Sent Events”, and your button event will have a bubble drawn around it with a link to a second bubble with the name of your IBAction.
• Click on the tiny cross (x) in the second bubble to delete the event link.

Now you can start again and rename the button to whatever you like. In my example I renamed it from:

(IBAction)dayNight:(id)sender{} 

to:

(IBAction)dayNightClick:(id)sender{} 

So this is renaming by deleting all references to the button and simply creating it again. Note the other two places to delete it from are:

• In the *.h file, example I deleted this line:

  (IBAction)dayNight:(id)sender{}

and in the *.m file, example I deleted this code:

(IBAction)dayNight:(id)sender{} 
{
    // code in here
}