NSScrollView右下角的处理

转自:http://blog.youkuaiyun.com/abby_sheen/article/details/7179209

1. @implementation MyScrollView    
2. - (void)drawRect:(NSRect)rect  
3. {       
4.       [super drawRect: rect];        
5.       if([self hasVerticalScroller] && [self hasHorizontalScroller])  
6.         {           
7.              NSRect vframe = [[self verticalScroller]frame];           
8.              NSRect hframe = [[self horizontalScroller]frame];           
9.              NSRect corner;           
10.              corner.origin.x = NSMaxX(hframe);           
11.              corner.origin.y = NSMinY(hframe);           
12.              corner.size.width = NSWidth(vframe);           
13.              corner.size.height = NSHeight(hframe);           
14.               // your custom drawing in the corner rect here           
15.              [[NSColor redColor] set];           
16.              NSRectFill(corner);   
17.        }   
18. }   
19. @end