Center image and text in UIButton

center-image-text-uibutton.m

- (void)centerImageTextInUIButton:(UIButton*)btn
{
    // set custom font
    UIFont *font = [UIFont fontWithName:@"SourceSansPro-Regular" size:12];
    [btn.titleLabel setFont:font];
    
    // the space between the image and text
    CGFloat spacing = 6.0;
    
    // lower the text and push it left so it appears centered
    //  below the image
    CGSize imageSize = btn.imageView.image.size;
    btn.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, - (imageSize.height + spacing), 0.0);
    
    // raise the image and push it right so it appears centered
    //  above the text
    CGSize titleSize = [btn.titleLabel.text sizeWithAttributes:@{NSFontAttributeName: btn.titleLabel.font}];
    btn.imageEdgeInsets = UIEdgeInsetsMake(- (titleSize.height + spacing), 0.0, 0.0, - titleSize.width);
    
    // increase the content height to avoid clipping
    CGFloat edgeOffset = fabsf(titleSize.height - imageSize.height) / 2.0;
    btn.contentEdgeInsets = UIEdgeInsetsMake(edgeOffset, 0.0, edgeOffset, 0.0);
    
}