embedding objects in another object and rotating them.

C4WorkSpace.m

//
//  C4WorkSpace.m
//  centered
//
//  Created by moi on 13-06-12.
//  Copyright (c) 2013 moi. All rights reserved.
//

#import "C4WorkSpace.h"

@implementation C4WorkSpace

-(void)setup {
    NSInteger gap = 10;
    CGFloat squareWidth = 50;
    CGFloat containerWidth = 6 * gap + 6 * squareWidth;
    C4Shape *container = [C4Shape rect:CGRectMake(0, 0, containerWidth, containerWidth)];
    container.lineWidth = 0;
    container.fillColor = [UIColor clearColor];

	for(int i = 0; i < 36; i++) {
        CGFloat x = i%6 * (squareWidth + gap);
        CGFloat y = i/6 * (squareWidth + gap);
        C4Shape *rect = [C4Shape rect:CGRectMake(x, y, squareWidth, squareWidth)];
        [container addShape:rect];
    }
    [self.canvas addShape:container];
    container.center = self.canvas.center;
    container.borderWidth = 1.0f;
    
    container.rotation = QUARTER_PI;
}
					
@end