Question

I have three buttons like this each corresponds to a different UIViewController:

For example, I press button 1. It will pass to the start button the view controller corresponding to that number that it will show.

I need to be able to pass it in this button:

Is it possible?

Answer 1

Yes, just create the UIButton as property on the view controller shown on button tap. Then, in the handler for the button tap, use the button property on the new controller to assign the button before showing the new controller.

Sample code:

//here's your method invoked when pressing the button 1
- (IBAction) pressedButtonOne:(id) sender {
    NewViewController *newVc = [[NewViewController alloc] initWithNibName:@"NewViewController" bundle:nil];
    newVc.startButton = self.startButton;
}

Here’s the code in the controller created when pressing button 1

NewViewController.h

#import <UIKit/UIKit.h>
@interface NewViewController : UIViewController
@property (nonatomic, retain) UIButton *startButton;

//NewViewController.m
- (void) viewDidLoad {
    //use self.startButton here, for whatever you need
}