How to make the UIButton background transparent?

Question

I tried use a transparent png as a background, but not success. How can I solve it ? thz.

Answer 1

Changing the Type to Custom in the Inspector window (Interface builder) worked for me.

Answer 2

To create a transparent button (without using an image):

- (void)viewDidLoad
{
    [super viewDidLoad];

    CALayer *layer = <your button>.layer;
    layer.backgroundColor = [[UIColor clearColor] CGColor];
    layer.borderColor = [[UIColor darkGrayColor] CGColor];
    layer.cornerRadius = 8.0f;
    layer.borderWidth = 1.0f;
}

Answer 3

This is a good one too:

[button.layer setBackgroundColor:[UIColor colorWithWhite:0.0 alpha:0.5].CGColor];