.h

UIImageView *drawImage_; CGPoint lastPoint_;

.m -( id) init { if( (self=[super init])) {         drawImage_ = [[[UIImageView alloc]initWithImage:nil]autorelease];         drawImage_. frame = CGRectMake( 0, 50, 320 ,400);         [[[ CCDirector sharedDirector ]openGLView ] addSubview : drawImage_ ];          self .isTouchEnabled = YES ; } return self ; }

– ( void)ccTouchesBegan:( NSSet *)touches withEvent:( UIEvent *)event {     UITouch *touch = [touches anyObject];     lastPoint_ = [touch locationInView :drawImage_ ];     }

– ( void)ccTouchesMoved:( NSSet *)touches withEvent:( UIEvent *)event {     UITouch *touch = [touches anyObject];      CGPoint currentPoint = [touch locationInView: drawImage_];     UIGraphicsBeginImageContext ( drawImage_ . frame . size );          [ drawImage_ .image drawInRect : CGRectMake ( 0 , 0 , drawImage_ .frame .size .width , drawImage_ .frame .size .height )];     CGContextSetLineCap (UIGraphicsGetCurrentContext (), kCGLineCapRound );      CGContextSetLineWidth (UIGraphicsGetCurrentContext (), 5.0 );     CGContextSetRGBStrokeColor (UIGraphicsGetCurrentContext (), 1.0,0.0,0.0 , 1.0 );     CGContextBeginPath (UIGraphicsGetCurrentContext ());     CGContextMoveToPoint (UIGraphicsGetCurrentContext (), lastPoint_ . x , lastPoint_ . y );     CGContextAddLineToPoint (UIGraphicsGetCurrentContext (), currentPoint. x , currentPoint. y );     CGContextStrokePath (UIGraphicsGetCurrentContext ());     drawImage_ . image = UIGraphicsGetImageFromCurrentImageContext ();     UIGraphicsEndImageContext ();     lastPoint_ = currentPoint; }

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