How to Draw a line in cocos2D

DrawLineLayer.m

//Source http://stackoverflow.com/questions/4538598/drawing-line-on-touches-moved-in-cocos2d
//CCLayer
-(void) ccTouchesMoved:(NSSet *)touched withEvent:(UIEvent *)event
{
    UITouch *touch = [touched anyObject];

    CGPoint currentTouchArea = [touch locationInView:[touch view] ];
    CGPoint lastTouchArea = [touch previousLocationInView:[touch view]];

    currentTouchArea = [[CCDirector sharedDirector] convertToGL:currentTouchArea];
    lastTouchArea = [[CCDirector sharedDirector] convertToGL:lastTouchArea];

    NSLog(@"current x=%2f,y=%2f",currentTouchArea.x, currentTouchArea.y);
    NSLog(@"last x=%2f,y=%2f",lastTouchArea.x, lastTouchArea.y);  

   userTouches addObject:NSStringFromCGPoint(currentTouchArea)];
   userTouches addObject:NSStringFromCGPoint(lastTouchArea)];
}

-(void) ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{   
    DrawMyTouch *line = [DrawMyTouch node];
    [self addChild: line];
}

//Node part (i.e. @interface DrawMyTouch: CCNode) :

@implementation DrawMyTouch

-(id) init
{
    if( (self=[super init])) 
    { }
    return self;
}

-(void)draw
{
    glEnable(GL_LINE_SMOOTH);

    for(int i = 0; i < [userTouches count]; i+=2)
    {
        start = CGPointFromString([userTouches objectAtIndex:i]);
        end = CGPointFromString([userTouches objectAtIndex:i+1]);

        ccDrawLine(start, end);
    }
}

@end