NSBeZierPath画虚线

    NSBezierPath *path = [NSBezierPath bezierPath];

    [path moveToPoint:CGPointMake(40, 40)];

    [path lineToPoint:CGPointMake(40, 140)];

    CGFloat dash[] = {5,5,5};

    [path setLineDash:dash count:3 phase:0];//!!!

    [[NSColor blueColor] setStroke];

    [path stroke];