iphone sdk button tags?

Question

I can't understand the logic og button tags. Can someone tell me how to use button tags?

For eg. There are two buttons on my view and I want to print something depending on their tags like:

if(button.tag==???)x{

}etc.

Answer 1

Yeah you can use the tag to retrieve the UIButtons, and apply the same logic with UIVIews (have a look at this method remembering that UIButton inherits from UIView). Specifically where do you have problems? Can you post some code/pseudo-code of yours?

Answer 2

When you create the button, you can set it's tag.

myButton1.tag = 0;
myButton2.tag = 1;

Or if you're using interface builder, there's a field in the inspector to set the tag.

I assume you've linked the buttons to call the same action when they're pressed, or else you wouldn't be needing to distinguish by tag, so your method should look like:

- (IBAction)buttonPressed:(id)sender
{
    UIButton *aButton = (UIButton *)sender; // we know the sender is a UIButton object, so cast it

    if (aButton.tag == 0)
    {
        // button 1 pressed
    }
    else if (aButton.tag = 1)
    {
        // button 2 pressed
    }
}