Checkbox in iOS application

Question

I need to add checkbox controls to my form. I know that there is no such control in iOS SDK. How could I do this?

Answer 1

Extending to Adrean's idea, i've achieved this using a very simple approach.
My idea is to change button (lets say checkBtn) text depending upon its state, and then change button's state in its IBAction.
Below is the code how i did this:

- (void)viewDidLoad
{
    [super viewDidLoad];

    [checkBtn setTitle:@"\u2610" forState:UIControlStateNormal];    // uncheck the button in normal state
    [checkBtn setTitle:@"\u2611" forState:UIControlStateSelected];  // check the button in selected state
}

- (IBAction)checkButtonTapped:(UIButton*)sender {
    sender.selected = !sender.selected;    // toggle button's selected state  

    if (sender.state == UIControlStateSelected) {    
        // do something when button is checked 
    } else {
        // do something when button is unchecked
    }
}