rotation-frame.m

- (NSArray *)TS_addRotationFrameViews;
{
    UIView  *baseView   = containerView;
    CGRect   bounds     = [baseView bounds];
    CGFloat  halfWidth  = ceilf(CGRectGetWidth(bounds) / 2.0f);
    CGFloat  halfHeight = ceilf(CGRectGetHeight(bounds) / 2.0f);
    
    UIView  *topView    = [[UIView alloc] initWithFrame:CGRectMake(CGRectGetMinX(bounds),
                                                                   CGRectGetMinY(bounds) - halfHeight,
                                                                   CGRectGetWidth(bounds),
                                                                   halfHeight)];
    UIView  *bottomView = [[UIView alloc] initWithFrame:CGRectMake(CGRectGetMinX(bounds),
                                                                   CGRectGetMaxY(bounds),
                                                                   CGRectGetWidth(bounds),
                                                                   halfHeight)];
    UIView  *leftView   = [[UIView alloc] initWithFrame:CGRectMake(CGRectGetMinX(bounds) - halfWidth,
                                                                   CGRectGetMinY(bounds),
                                                                   halfWidth,
                                                                   CGRectGetHeight(bounds))];
    UIView  *rightView  = [[UIView alloc] initWithFrame:CGRectMake(CGRectGetMaxX(bounds),
                                                                   CGRectGetMinY(bounds),
                                                                   halfWidth,
                                                                   CGRectGetHeight(bounds))];
    
    [topView    setAutoresizingMask:UIViewAutoresizingFlexibleWidth  | UIViewAutoresizingFlexibleBottomMargin];
    [bottomView setAutoresizingMask:UIViewAutoresizingFlexibleWidth  | UIViewAutoresizingFlexibleTopMargin];
    [leftView   setAutoresizingMask:UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleRightMargin];
    [rightView  setAutoresizingMask:UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin];
    
    [baseView addSubview:topView];
    [baseView addSubview:bottomView];
    [baseView addSubview:leftView];
    [baseView addSubview:rightView];
    
    NSArray *ret = [NSArray arrayWithObjects:(id[]){ topView, bottomView, leftView, rightView } count:4];
    
    [ret setValue:[UIColor blackColor] forKey:@"backgroundColor"];
    
    return ret;
}