gistfile1.m

@interface __PLGBorderTopButton : UIView

@property (nonatomic) PLGColor selectedColor;
@property (nonatomic) UIButton* button;

@end

@implementation __PLGBorderTopButton

- (id)forwardingTargetForSelector:(SEL)aSelector
{
    return _button;
}

- (void)tapped
{
    self.backgroundColor = [PLGTheme colorWithColor:_selectedColor];
}

- (void)layoutSubviews
{
    CGRect f = self.frame;
    CGFloat height = f.size.height-5;
    CGFloat width = f.size.width;
    _button.frame = CGRectMake(0, 5, width, height);
}

- (id)initWithColor:(PLGColor)color topColor:(PLGColor)topColor
{
    self = [super initWithFrame:CGRectMake(0, 0, 100, 44.0f)];
    
    if (self)
    {
        _button = [PLGTheme buttonWithColor:color];
        [_button addObserver:self forKeyPath:@"state" options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld context:NULL];
        [self addSubview:_button];
        _selectedColor = topColor;
        self.backgroundColor = [PLGTheme colorWithColor:PLGWhite];
    }
    
    return self;
}

@end