ビューの階層構造をログ出力する - Qiita<UIView: 0x7ff192717cc0; frame = (0 0; 320 568); autoresize = W+H; gestureRecognizers = <NSArray: 0x7ff19264f0d0>; layer = <CALayer: 0x7ff192717d90>> | <UIView: 0x7ff1927198e0; frame = (0 60; 320 183); autoresize = RM+BM; layer = <CALayer: 0x7ff1927199b0>> | | <UITextField: 0x7ff192656c40; frame = (8 57; 304 30); text = '1'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; gestureRecognizers
