Preciso liberar o contexto retornado de UIGraphicsGetCurrentContext ()?
estou usandoCGContextRef.
UIGraphicsBeginImageContext(self.drawImage.frame.size);
CGContextRef context=UIGraphicsGetCurrentContext();
CGContextSetRGBStrokeColor(context,0.0f,0.0f,0.0f,1.0f);
UIGraphicsEndImageContext();
CGContextRelease(context);
Preciso ligarCGContextRelease(Context); no acima.