C4Control removeFromSuperview:

C4Workspace.m

//
//  C4WorkSpace.m
//  Examples
//
//  Created by Greg Debicki.
//

#import "C4WorkSpace.h"

@implementation C4WorkSpace {
    C4Shape *s1, *s2, *s3, *s4;
}

-(void)setup {
    [self setupShapes];
}

-(void)s1remove {
    //Here's the bit that removes the shape from the canvas
    [s1 removeFromSuperview];
    [self runMethod:@"s1add" afterDelay:1.0f];
}

-(void)s1add {
    [self.canvas addShape:s1];
}

-(void)s2remove {
    [s2 removeFromSuperview];
    [self runMethod:@"s2add" afterDelay:1.0f];
}

-(void)s2add {
    [self.canvas addShape:s2];
}

-(void)s3remove {
    [s3 removeFromSuperview];
    [self runMethod:@"s3add" afterDelay:1.0f];
}

-(void)s3add {
    [self.canvas addShape:s3];
}
-(void)s4remove {
    [s4 removeFromSuperview];
    [self runMethod:@"s4add" afterDelay:1.0f];
}

-(void)s4add {
    [self.canvas addShape:s4];
}

-(void) setupShapes {
    CGRect rect = CGRectMake(0, 0, 100, 100);
    
    s1 = [C4Shape rect:rect];
    s2 = [C4Shape rect:rect];
    s3 = [C4Shape rect:rect];
    s4 = [C4Shape rect:rect];
    
    CGPoint centerPoint = self.canvas.center;
    
    centerPoint.x -= 75;
    centerPoint.y -= 75;
    s1.center = centerPoint;
    
    centerPoint.x += 150;
    s2.center = centerPoint;
    
    centerPoint.y += 150;
    s3.center = centerPoint;
    
    centerPoint.x -= 150;
    s4.center = centerPoint;
    
    
    [self.canvas addObjects:@[s1,s2,s3,s4]];
    
    [self listenFor:@"touchesBegan" fromObject:s1 andRunMethod:@"s1remove"];
    [self listenFor:@"touchesBegan" fromObject:s2 andRunMethod:@"s2remove"];
    [self listenFor:@"touchesBegan" fromObject:s3 andRunMethod:@"s3remove"];
    [self listenFor:@"touchesBegan" fromObject:s4 andRunMethod:@"s4remove"];
}

@end