Question

I have to click on done button to dismiss modalview programmatically. I think UIButton is better than UIBarButtonItem to add UIControlEventsTouchupInside.

But with UIButton I’m confused what buttontype should use.

   UIButton *button = [UIButton buttonWithType:UIButtonTypeInfoLight];

[button addTarget:self action:@selector(displayModalViewaction:) forControlEvents:UIControlEventTouchUpInside];    

  UIBarButtonItem * button = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
                                                                          target:self
                                                                          action:@selector(dismissViewaction:)] autorelease];

Answer 1

You will most likely want to use UIButtonTypeRoundedRect or UIButtonTypeCustom

With the custom type, you can add images for display.
You can try “stealing” these images from the UIBarButtonItem (image property defined in UIBarItem) and making the custom button look like the UIBarButtonSystemItemDone button

UIBarButtonItem * buttonForImage = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:nil                                                                       action:nil] autorelease];

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

[button addTarget:self action:@selector(displayModalViewaction:) forControlEvents:UIControlEventTouchUpInside];

[button setImage:buttonForImage.image forState:UIControlStateNormal];

Things to look out for. When setting an image for a UIButton, it does not scale to the size of the button according to contentMode property. If you want the image to follow the rules of the contentMode property, use setBackgroundImage: forState: instead.