How To Know UIButton Pressed Ios/Iphone

property (nonatomic, strong)  UIButton *btn1;
@property (nonatomic, strong) UIButton *btn2;
@property (nonatomic, strong) UIButton *btn3;

btn1.tag=1;
btn2.tag=2;
btn3.tag=3;

[btn1 addTarget:self action:@selector(difficultyButtonPressed:)

forControlEvents:UIControlEventTouchUpInside];

[btn2 addTarget:self action:@selector(difficultyButtonPressed:)

forControlEvents:UIControlEventTouchUpInside];

[btn3 addTarget:self action:@selector(difficultyButtonPressed:)

forControlEvents:UIControlEventTouchUpInside];

- (IBAction)difficultyButtonPressed:(UIButton*)sender
{
 NSLog(@"Button tag is %d",sender.tag);

     // you can use if else condition using sender.tag  like

      if(sender.tag==1)//first button related identifire
      {
           [self performSegueWithIdentifier:

          @"mainGameTurnGuess_FirstButtonIdentirier" sender:sender];
      }
      else if(sender.tag==2)//second button related identifier
      {
            [self performSegueWithIdentifier:

            @"mainGameTurnGuess_secondButtonIdentirier" sender:sender];
      }
      else   //Third button related identifier
      {
            [self performSegueWithIdentifier:

         @"mainGameTurnGuess_ThirdButtonIdentirier" sender:sender];
      }

} 

- (IBAction)difficultyButtonPressed:(id)sender {
    UIButton *button = (UIButton *)sender;
    NSLog(@"Button tag is %d",button.tag);
}