NSBezierPath *path = [NSBezierPath bezierPath];
///
//NSViewのサブクラス　MyViewのDrawRectに上書き
-(void)drawRect:(NSRect)rect
{

NSBezierPath *thePath = [NSBezierPath bezierPath];

[thePath moveToPoint:NSMakePoint(20,20)];
[thePath lineToPoint:NSMakePoint(120,120)];

[[NSColor redColor] set];

[thePath stroke];


}