How to Write in iPad on finger move

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
   
    mouseSwiped = NO;
    UITouch *touch = [[event allTouches] anyObject];
   
    lastPoint = [touch locationInView:self.view];
    lastPoint.y -=180;
    lastPoint.x -=90;
    CGPoint location = [touch locationInView:self.view];
    imageView.center = location;

    }


- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

    mouseSwiped = YES;
       
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView:self.view];
    imageView.center = location;

       
    {       
        CGPoint currentPoint = [touch locationInView:self.view];
        currentPoint.y -=180;
        currentPoint.x -=90;
       
        UIGraphicsBeginImageContext(drawImage.frame.size);
        [drawImage.image drawInRect:CGRectMake(0, 0, 618, 636)];
       
       
       
        CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
        CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0);
       
        if (isWritingEnabled) {
            CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 1.0, 0.0, 0.0, 1.0);           
        }
         else
{
             CGContextSetLineWidth(UIGraphicsGetCurrentContext(),15);
            CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeClear);
        }
        CGContextBeginPath(UIGraphicsGetCurrentContext());
        CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
        CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
        CGContextStrokePath(UIGraphicsGetCurrentContext());
        drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
       
       
       
        UIGraphicsEndImageContext();
       
        lastPoint = currentPoint;
       
    }
   
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
   
   
        if(!mouseSwiped) {
            UIGraphicsBeginImageContext(drawImage.frame.size);
            [drawImage.image drawInRect:CGRectMake(0, 0, 618, 636)];
            CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
            CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0);
            CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 1.0, 0.0, 0.0, 1.0);
            CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
            CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
            CGContextStrokePath(UIGraphicsGetCurrentContext());
            CGContextFlush(UIGraphicsGetCurrentContext());
           
            drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();
        }
   
   
}