Question

I am trying to combine two image views and put them into another image view which I am assigning to background image of a button.Somehow this is not working.Could someone please check and let me know what exactly is wrong here.

    UIImageView * image1 = [[UIImageView alloc] initWithImage:[UIImage    imageNamed:@"homesmall.png"]];
    UIImageView * image2 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"update.png"]];

    [image1 setFrame:CGRectMake(16,0,16,16)];
    [image2 setFrame:CGRectMake(0,0,16,16)];

    UIImageView *cellAcc = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,32,16)];

    [cellAcc addSubview:image1];
    [cellAcc addSubview:image2];
    UIImage *image = [cellAcc image];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    CGRect frame = CGRectMake(0.0, 0.0, image.size.width, image.size.height);
    button.frame = frame;
    [button setBackgroundImage:image forState:UIControlStateNormal];

Answer 1

You are adding them as subviews. There is no additive property here. You will have to use quartz to draw them into an image context and extract the combined image.

Edit

You can replace

UIImage *image = [cellAcc image];

with

UIGraphicsBeginImageContext(cellAcc.bounds.size);
[cellAcc.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();