iOS画0.X粗细的线

 CAShapeLayer *lineShape = nil;

            CGMutablePathRef linePath = nil;

            linePath = CGPathCreateMutable();

            lineShape = [CAShapeLayer layer];

            lineShape.lineWidth = 0.4f;

            lineShape.lineCap = kCALineCapRound;;

            lineShape.strokeColor = [ToolList getColor:@"cccccc"].CGColor;

            CGFloat x = 0; CGFloat y = 0.4f;

            CGFloat toX = 320; CGFloat toY = 0.4f;

            CGPathMoveToPoint(linePath, NULL, x, y);

            CGPathAddLineToPoint(linePath, NULL, toX, toY);

            lineShape.path = linePath;

            CGPathRelease(linePath);

            [cell.layer addSublayer:lineShape];