Every answer I can find on the net on this is talking about Swift for UIKit.
I have made my own sub-class for NSButton.
Buttons are showing there aspect when running the target but not when I create them in IB.
Here is my Header file:
#import <Cocoa/Cocoa.h>
@interface flatButton : NSButton
@property (nonatomic) IBInspectable CGFloat Animate;
@property (nonatomic, strong) IBInspectable NSColor *TextNormal;
@property (nonatomic, strong) IBInspectable NSColor *TextActive;
@property (nonatomic, strong) IBInspectable NSColor *FillNormal;
@property (nonatomic, strong) IBInspectable NSColor *FillActive;
@property (nonatomic) IBInspectable CGFloat CornerRadius;
@property (nonatomic, strong) IBInspectable NSColor *BorderNormal;
@property (nonatomic, strong) IBInspectable NSColor *BorderActive;
@property (nonatomic) IBInspectable CGFloat BorderWidth;
@property (strong) NSCursor *cursor;
@end
If I understand well, IB_DESIGNABLE must be somewhere in the header.
But it seems to me it will not suffice.