????????????????
????(lldb) po $x0
????<CALayer:0x174c38500; position = CGPoint (215 220.375); bounds = CGRect (0 0; 55 6); delegate = <GrayPageControl: 0x15fe26ca0; baseClass = UIPageControl; frame = (187.5 217.375; 55 6); autoresize = W; layer = <CALayer: 0x174c38500>>; sublayers = (<CALayer: 0x170a3fd40>?? <CALayer: 0x1704250a0>?? <CALayer: 0x174c38200>?? <CALayer: 0x174c38080>); opaque = YES; allowsGroupOpacity = YES; >
????(lldb) finish
????(lldb) po 0x174c38500
????<CALayer:0x174c38500; position = CGPoint (215 220.375); bounds = CGRect (0 0; 110 6); delegate = <GrayPageControl: 0x15fe26ca0; baseClass = UIPageControl; frame = (160 217.375; 110 6); autoresize = W; layer = <CALayer: 0x174c38500>>; sublayers = (<CALayer: 0x170a3fd40>?? <CALayer: 0x1704250a0>?? <CALayer: 0x174c38200>?? <CALayer: 0x174c38080>); opaque = YES; allowsGroupOpacity = YES; >
????????????iPhone 6/iOS8?? cpu??ARM64 ????òο?????link??bcattle??????????????$x0?? iphone 5/iOS7 ????$r0 ?????????仯????????????????????????layoutSubviews ?????UITableView?????????UITableViewCell??????
????http://stackoverflow.com/questions/13976219/how-do-i-set-an-lldb-watchpoint-on-a-property-of-self-view
??????????????????????????so??????PageControl UITableViewCell layoutSubViews??center ??????п????????????????????AutoLayout??????д??У?
1 [pc setTranslatesAutoresizingMaskIntoConstraints:NO];
2 [cell.contentView addConstraints:[NSLayoutConstraint
3                   constraintsWithVisualFormat:@"H:|-0-[pc]-0-|”
4                                       options:0
5                                       metrics:nil
6                                         views:NSDictionaryOfVariableBindings(pc)]];
7
8 [cell.contentView addConstraints:[NSLayoutConstraint
9                     constraintsWithVisualFormat:[NSString stringWithFormat: @"V:|-%f-[pc]-11-|"??  CGRectGetHeight(scroll.frame)-11-6]
10                                         options:0
11                                         metrics:nil
12     views:NSDictionaryOfVariableBindings(pc)]];
???????????????????????????????AutoLayout??????????Masonry?????????
????1 [pc mas_makeConstraints:^(MASConstraintMaker * make){
????2     make.bottom.equalTo(cell.contentView.mas_bottom).with.offset(-6);
????3     make.centerX.equalTo(cell.contentView.mas_centerX);
????4 }];
????β????storyboard??????????sizeClass???????????????????????