How to know which UIButton is pressed when

there are more than one UIButton in a view?

Suppose there are two buttons in a view

Now in the identity inspector window for button0 set the tag value=0

Set the tag value for button1 as 1 in the same way as for button0

Now here is the coding part

Link the following method with both the buttons in the Interface Builder

-(IBAction)action:(id)sender
{
if ([sender tag]==0) {
NSLog(@"button0");
}
else
{
NSLog(@"button1");
}
}

Here sender gets the identity of the button object which is pressed.

By using  [sender tag] we get to know which button was pressed.

Same thing applies for more than two buttons provided different tag values should be used for each UIButton object.