UIButton doesn't listen to content mode setting?

Question

firstButton is a UIButton of type Custom. I\'m programmatically putting three of them across each cell of a table, thusly:

[firstButton setImage:markImage fo         


        

Answer 1

After a couple of hours of confusion, here's how I got it to work under iOS 3.2. As dusker mentioned, using setBackgroundImage instead of setImage did the job for me.

CGRect myButtonFrame = CGRectMake(0, 0, 250, 250);
UIImage *myButtonImage = [UIImage imageNamed:@"buttonImage"];

UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];

[myButton setBackgroundImage:myButtonImage forState:UIControlStateNormal];
[myButton setFrame: myButtonFrame];
[myButton setContentMode: UIViewContentModeScaleAspectFit];

Answer 2

If you're dealing with the UIButton's image (as opposed to it's backgroundImage), setting the contentMode on the UIButton itself or on its imageView has no effect (despite what other answers say).

Alternatively do this instead:

self.button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentFill;
self.button.contentVerticalAlignment = UIControlContentVerticalAlignmentFill;

Or size your image accordingly.

OR just use a UIImageView (which properly respects contentMode) with a UITapGestureRecognizer attached to it, or a transparent UIButton on top of it.

Answer 3

The answer is to use a UIImageView with all the lovely Content Mode settings you want, and then layer a custom button on top of it. Dumb that you can't do that all in one shot, but it appears that you can't.

Answer 4

I believe we have a simple interface builder issue here - apparently the IB ignores any content-mode changes AFTER you have set the image-property.

the solution is as simple: set the content mode, remove previously set image-names (make sure you remove it in all states, default, highlighted etc.), then re-enter the desired image-names in all desired states - et voilà.

Answer 5

If the UIButton does not seem to listen to the layout constraint settings, do check whether the images are larger than the button size. Always use the @2x and @3x images for retina resolutions.

Answer 6

My answer is similar to Kuba's. I needed my image to be programatically set.

UIImage *image = [[UIImage alloc] initWithContentsOfFile:...];
[button setBackgroundImage:image forState:UIControlStateNormal];
button.imageView.contentMode = UIViewContentModeScaleAspectFill; //this is needed for some reason, won't work without it.
for(UIView *view in button.subviews) {
    view.contentMode = UIViewContentModeScaleAspectFill;
}