Open Radar

 
Summary:
In an IBDesignable subclass of UIButton, when calling setImage: programmatically …
if the frame size in IB is set larger than the image, it STRETCHES when it shouldn’t.  (Button background images stretch; foreground images don’t.)

Sample code, from subclass "CustomButton : UIButton”:

IB_DESIGNABLE
@interface CustomButton ()
@property (nonatomic, strong) IBInspectable NSString *buttonStyle;
@end

-(void)setButtonStyle:(NSString *)styleName {
    if ([styleName isEqualToString:@“play"]) {
        UIImage *foregroundImage = [UIImage imageNamed:(@“icon-play")
                       inBundle:[NSBundle bundleForClass:[self class]]
                compatibleWithTraitCollection:nil];

        [self setImage:foregroundImage forState:UIControlStateNormal];
    }
}

Steps to Reproduce:

In Interface Builder:
- Add a “Button” from the Object library to a view controller’s view
- Change its Class to a custom subclass containing the IBInspectable code below
- Add a graphic asset by the referenced name (and consisting of an image something *other* than blue) to the project’s Images.xcassets 
- In IB’s Attributes Inspector, change the Button Style to the string value referenced in the code
- Stretch the frame of the button in the canvas to larger than the icon’s actual size
- Once IBDesignable updates, observe that the image is displayed stretched, when it shouldn’t be

[Please see attached images.  Note that the tinting of the image is a separate issue (#20200040).  To work around it temporarily, type in a dummy string value for the ‘image’ property in the Attributes inspector, then re-expand the button’s frame size in the canvas.]


Expected Results:
The image should align in the same way foreground images normally do (incl. how it does at runtime) — and NOT stretch.

Version:
OS X 10.9.5, Xcode 6.1.1; OS X 10.10.2, Xcode 6.3b3

Attachments:
'button-image-stretch1a.png' and 'button-image-stretch1b.png' were successfully uploaded.