problem of CGContext
<p>i want to draw a line in the rect of UIView when i touch screen.
please can someone help me to check the code !
thanks    </p>

<pre><code>- (void)drawRect:(CGRect)rect {
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetLineWidth(context, 5.0);
    CGContextSetStrokeColorWithColor(context, [UIColor greenColor].CGColor);
    CGContextSetFillColorWithColor(context, [UIColor greenColor].CGColor);
    CGContextMoveToPoint(context, 100.0, 30.0);
    CGContextAddLineToPoint(context, 200.0, 30.0);
    CGContextStrokePath(context);
}
</code></pre>

<p>thanks.</p>
