How to have a method for each UIButton in an array - iphone

Question

I have an array of UIButtons in the following code. Problem I'm having is that I need a unique method associated with each button. At the moment any button that's pressed all use the action:#selector(buttonPressed:)
I'm stuck on how to have a method hooked up to each button.
// Create buttons
NSMutableArray* buttonArray = [NSMutableArray array];
NSArray * myImages = [NSArray arrayWithObjects:#"category-cafe-unsel.png", #"category-food-unsel.png", #"category-clothing-unsel.png", #"category-health-unsel.png", #"category-tech-unsel_phone.png" , #"category-tech2-unsel.png", #"catefory-theatre-unsel.png", #"category-travel-unsel.png", nil];
// only create the amount of buttons based on the image array count
for(int i = 0;i < [myImages count]; i++)
{
// Custom UIButton
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setFrame:CGRectMake(0.0f, 20.0f, 52.0f, 52.0f)];
[btn setTitle:[NSString stringWithFormat:#"Button %d", i] forState:UIControlStateNormal];
[btn setImage:[UIImage imageNamed:[myImages objectAtIndex:i]] forState:UIControlStateNormal];
[btn addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[buttonArray addObject:btn];
}
thanks for any help
:)

Answer 1

Best option is to use same method for all buttons.For that you should use tags. So each button has its own tag.
btn.tag = i;
Here tag number will be used for differentiating which button was called.
And then in the method you can get the tags, this can also be done with a switch-statement:
-(void)buttonPressed:(UIButton*)sender
{
if( sender.tag == 1 ){
} else {
}
}

Answer 2

Use following code:
-(void)buttonPressed:(UIButton*)sender
{
UIButton *btn = sender;
for(int i = 0;i < [myImages count]; i++)
{
if (i == [btn tag]) {
//Your code
break;
}
}
}
It's completly working fine. When you'll get Tag value, you can perform operations as per tag value.
Thanks,
Hemang.

Answer 3

[btn addTarget:self action:#selector(NSSelectorFromString([NSString stringWithFormat:#"button%d", i])) forControlEvents:UIControlEventTouchUpInside];
And the corresponding actions would be:
-(void)button1:(UIButton*)sender
-(void)button2:(UIButton*)sender
-(void)button3:(UIButton*)sender
-(void)button4:(UIButton*)sender
and so forth.
However, alternatively consider having one action method only and using tags to separate the buttons within the action method.