How do I prevent a button's background image from stretching?

Question

I\'m allocating a UIButtonTypeCustom UIButton to a UIView with a background image that is smaller than the button\'s frame. Reason why the image is smaller is because I\'m tryin

Answer 1

Stumbled on this problem too.

Adding image programmatically, as memmons thoroughly explained, did not help:(

I had a button 100x40 and image 100x100, it would appear squeezed, not fitted, as one would infer from "Aspect Fit" option. Actually, non of those view options had an effect.

I just had to rescale it so it would fit on a button, then use setImage:

UIImage *img=[UIImage imageNamed:@"myimage.png"];
CGImageRef imgRef = [img CGImage];
CGFloat imgW = CGImageGetWidth(imgRef);
CGFloat imgH = CGImageGetHeight(imgRef);
CGFloat btnW = myBttn.frame.size.width;
CGFloat btnH = myBttn.frame.size.height;
//get lesser button dimension
CGFloat minBtn=btnW;
if (btnW>btnH) {
    minBtn=btnH;
}
//calculate scale using greater image dimension
CGFloat scl=imgH/minBtn;
if (imgW>imgH) {
    scl=imgW/minBtn;
}
//scale image
UIImage *scaledImage = [UIImage imageWithCGImage:[img CGImage] scale:(img.scale * scl) orientation:(img.imageOrientation)];
//clean up
UIGraphicsEndImageContext();
//set it on a button
[myBttn setImage:scaledImage forState:UIControlStateNormal];