EDIT: 2014-09-26: video フルスクリーン再生中など復数 window がある場合に対応できるように更新

(lldb) expr -- for(UIWindow *w in [(UIApplication *)[UIApplication sharedApplication] windows]) { (int)printf("%s\n\n", [(NSString *)[w recursiveDescription] UTF8String]); }
<UIWindow: 0xbb25ae0; frame = (0 0; 768 1024); layer = <UIWindowLayer: 0xbb25a30>>
   | <UIView: 0xbb431a0; frame = (20 0; 748 1024); transform = [0, -1, 1, 0, 0, 0]; autoresize = W+H; layer = <CALayer: 0xbb43250>>
   |    | <UIView: 0xbb43ea0; frame = (0 0; 276 0); autoresize = W+H; layer = <CALayer: 0xbb43f00>>
   |    |    | <UIScrollView: 0xbb441f0; frame = (0 0; 276 0); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0xbb44b70>; layer = <CALayer: 0xbb44410>; contentOffset: {0, 0}>
   |    |    |    | <UILabel: 0xbb47cf0; frame = (70 90; 200 30); text = 'Stream 3 of 3 ...'; clipsToBounds = YES;

EDIT: 2013-11-04: このコマンドを憶えられないで毎回このページを参照してるのがイヤになったので、~/.lldbinit に alias を作って view で同じことができるようにした。

~/.lldbinit

command alias view expr -- for(UIWindow *w in [(UIApplication *)[UIApplication sharedApplication] windows]) { (int)printf("%s\n\n", [(NSString *)[w recursiveDescription] UTF8String]); }