这里有一个动态将cell 的某个子视图移除的范例：
(lldb) po cell.contentView.subviews
<__NSArrayM 0x60800005f5f0>(
<UILabel: 0x7f91f4f18c90; frame = (5 5; 300 25); text = '2 - Drawing index is top ...'; userInteractionEnabled = NO; tag = 1; layer = <_UILabelLayer: 0x60800009ff40>>,
<UIImageView: 0x7f91f4d20050; frame = (105 20; 85 85); opaque = NO; userInteractionEnabled = NO; tag = 2; layer = <CALayer: 0x60000003ff60>>,
<UIImageView: 0x7f91f4f18f10; frame = (200 20; 85 85); opaque = NO; userInteractionEnabled = NO; tag = 3; layer = <CALayer: 0x608000039860>>
)
(lldb) call [label removeFromSuperview]
(lldb) po cell.contentView.subviews
<__NSArrayM 0x600000246de0>(
<UIImageView: 0x7f91f4d20050; frame = (105 20; 85 85); opaque = NO; userInteractionEnabled = NO; tag = 2; layer = <CALayer: 0x60000003ff60>>,
<UIImageView: 0x7f91f4f18f10; frame = (200 20; 85 85); opaque = NO; userInteractionEnabled = NO; tag = 3; layer = <CALayer: 0x608000039860>>
)
5.bt命令
bt 命令 可以打印出线程的堆栈信息，该信息比左侧的Debug Navigator 看到的还要详细一些。
bt 命令是打印当前线程的堆栈信息
(lldb) bt
* thread #1: tid = 0x27363, 0x000000010d204125 TestDemo`-[FifthViewController tableView:cellForRowAtIndexPath:](self=0x00007f91f4e153c0, _cmd="tableView:cellForRowAtIndexPath:", tableView=0x00007f91f5889600, indexPath=0xc000000000400016) + 2757 at FifthViewController.m:91, queue = 'com.apple.main-thread', stop reason = breakpoint 6.1
* frame #0: 0x000000010d204125 TestDemo`-[FifthViewController tableView:cellForRowAtIndexPath:](self=0x00007f91f4e153c0, _cmd="tableView:cellForRowAtIndexPath:", tableView=0x00007f91f5889600, indexPath=0xc000000000400016) + 2757 at FifthViewController.m:91
frame #1: 0x0000000111d0a7b5 UIKit`-[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 757
frame #2: 0x0000000111d0aa13 UIKit`-[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 74
frame #3: 0x0000000111cde47d UIKit`-[UITableView _updateVisibleCellsNow:isRecursive:] + 3295
frame #4: 0x0000000111d13d95 UIKit`-[UITableView _performWithCachedTraitCollection:] + 110
frame #5: 0x0000000111cfa5ef UIKit`-[UITableView layoutSubviews] + 222
frame #6: 0x0000000111c61f50 UIKit`-[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1237
frame #7: 0x00000001117a5cc4 QuartzCore`-[CALayer layoutSublayers] + 146
frame #8: 0x0000000111799788 QuartzCore`CA::Layer::layout_if_needed(CA::Transaction*) + 366
frame #9: 0x0000000111799606 QuartzCore`CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 24
frame #10: 0x0000000111727680 QuartzCore`CA::Context::commit_transaction(CA::Transaction*) + 280
frame #11: 0x0000000111754767 QuartzCore`CA::Transaction::commit() + 475
frame #12: 0x00000001117550d7 QuartzCore`CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 113
frame #13: 0x0000000110743e17 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
frame #14: 0x0000000110743d87 CoreFoundation`__CFRunLoopDoObservers + 391
frame #15: 0x0000000110728b9e CoreFoundation`__CFRunLoopRun + 1198
frame #16: 0x0000000110728494 CoreFoundation`CFRunLoopRunSpecific + 420
frame #17: 0x0000000114390a6f GraphicsServices`GSEventRunModal + 161
frame #18: 0x0000000111b9d964 UIKit`UIApplicationMain + 159
frame #19: 0x000000010d21294f TestDemo`main(argc=1, argv=0x00007fff529fe620) + 111 at main.m:14
frame #20: 0x000000011458a68d libdyld.dylib`start + 1
(lldb)
