将现有的UIViewController
转换为自动布局后,我遇到了这个崩溃,但我无法弄清楚是什么原因导致的。我搜索了dispatch_async(dispatch_get_global_queue(...))
调用,但没有改变布局。
堆栈跟踪也没有提供太多帮助:
* thread #18: tid = 0x73617, 0x0000000183aa8524 libobjc.A.dylib`objc_exception_throw, stop reason = breakpoint 3.1
* frame #0: 0x0000000183aa8524 libobjc.A.dylib`objc_exception_throw
frame #1: 0x0000000185071100 CoreFoundation`+[NSException raise:format:] + 116
frame #2: 0x0000000185c83894 Foundation`_AssertAutolayoutOnAllowedThreadsOnly + 192
frame #3: 0x0000000185c835d4 Foundation`-[NSISEngine _optimizeWithoutRebuilding] + 76
frame #4: 0x0000000185aceddc Foundation`-[NSISEngine optimize] + 112
frame #5: 0x0000000185c82270 Foundation`-[NSISEngine performPendingChangeNotifications] + 112
frame #6: 0x000000018af23e18 UIKit`-[UIView(Hierarchy) layoutSubviews] + 220
frame #7: 0x000000018b15fff8 UIKit`-[UISlider layoutSubviews] + 192
frame #8: 0x000000018af23a80 UIKit`-[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1196
frame #9: 0x00000001883d19d8 QuartzCore`-[CALayer layoutSublayers] + 148
frame #10: 0x00000001883c64cc QuartzCore`CA::Layer::layout_if_needed(CA::Transaction*) + 292
frame #11: 0x00000001883c638c QuartzCore`CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 32
frame #12: 0x00000001883433e0 QuartzCore`CA::Context::commit_transaction(CA::Transaction*) + 252
frame #13: 0x000000018836aa68 QuartzCore`CA::Transaction::commit() + 512
frame #14: 0x000000018836af34 QuartzCore`CA::Transaction::release_thread(void*) + 660
frame #15: 0x0000000184103fbc libsystem_pthread.dylib`_pthread_tsd_cleanup + 572
frame #16: 0x0000000184103ce4 libsystem_pthread.dylib`_pthread_exit + 200
frame #17: 0x0000000184103378 libsystem_pthread.dylib`_pthread_wqthread + 1504
frame #18: 0x0000000184102d8c libsystem_pthread.dylib`start_wqthread + 4
(lldb)
有没有办法找出导致布局触发的确切位置?