How does NSScrollView works? - cocoa

Question

How does NSScrollView works in mac applications? I've write the following code but the scrolling is not working.
NSDictionary *temp=[[ NSDictionary alloc] init ];
NSScrollView *scroll = [[NSScrollView alloc ] initWithFrame:CGRectMake(0, 0, 100, 100)];
NSArray *dicArray=[NSArray arrayWithObjects:dict,dict1,dict2,dict3,dict4, nil];
for (int i=0; i<[dicArray count]; i++)
{
int offset=100;
int x=10;
int y=20;
y=y+(i*offset);
temp= [dicArray objectAtIndex:i];
NSRect titleRect=NSMakeRect(x,y,100,30);
NSRect subtitleRect=NSMakeRect(x, y+20, 400, 20);
NSTextField *title=[[NSTextField alloc] initWithFrame:titleRect];
[[title cell] setStringValue:[temp objectForKey:key]];
[[title cell] setWraps:NO];
[[title cell] setScrollable:YES];
[[title cell] setEditable:NO];
[[title cell] setFont:[NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSMinusSetExpressionType]]];
[title setDrawsBackground:NO];
[title setBordered:NO];
NSTextField *subtitle=[[NSTextField alloc] initWithFrame:subtitleRect ];
[[subtitle cell] setStringValue:[temp objectForKey:subkey]];
[[subtitle cell] setWraps:NO];
[[subtitle cell] setScrollable:YES];
[[subtitle cell] setEditable:NO];
[[subtitle cell] setFont:[NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSMiniControlSize]]];
[subtitle setDrawsBackground:NO];
[subtitle setBordered:NO];
[scroll addSubview:title];
[scroll addSubview:categoryOkButton];
[scroll addSubview:subtitle];
}
[[self window] setContentView:scroll];
[scroll release];

Answer 1

My Cocoa is a bit rusty, but NSScrollView works in a different way than UIScrollView. You don't just add subviews, that doesn't work with NSScrollView.
What you need is a container view into which you add all your subviews. So you create an NSView of the appropriate size and add all your views to that container view. Then you set:
[myScrollView setDocumentView:myContainerView];
See the Scroll View Programming Guide for more details.