我试图通过以下代码/代码段找到崩溃。
Thread : Crashed: com.apple.main-thread
0 libobjc.A.dylib 6771342288 objc_msgSend + 16
1 Foundation 6488040888 vars_index_with_insert + 396
2 Foundation 6488046624 -[NSISLinearExpression setCoefficient:forVariable:] + 372
3 Foundation 6488038164 -[NSLayoutConstraint _lowerIntoExpression:reportingConstantIsRounded:] + 432
4 Foundation 6488033112 -[NSLayoutConstraint _tryToChangeContainerGeometryWithUndoHandler:] + 136
5 Foundation 6488032176 -[NSLayoutConstraint _setSymbolicConstant:constant:] + 420
6 UIKit 6558145124 -[UIWindow(AdditionalLayoutSupport) _windowInternalConstraints_sizeDidChange] + 220
7 UIKit 6553937808 -[UIWindow _setFrame:sendTraitNotifications:] + 436
8 UIKit 6553925712 __78-[UIWindow _rotateWindowToOrientation:updateStatusBar:duration:skipCallbacks:]_block_invoke1072 + 264
9 UIKit 6556461676 __58-[_UIWindowRotationAnimationController animateTransition:]_block_invoke + 56
10 UIKit 6551262980 +[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 508
11 UIKit 6551360196 +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] + 68
12 UIKit 6556461540 -[_UIWindowRotationAnimationController animateTransition:] + 388
13 UIKit 6553920912 -[UIWindow _rotateToBounds:withAnimator:transitionContext:] + 800
14 UIKit 6553924620 -[UIWindow _rotateWindowToOrientation:updateStatusBar:duration:skipCallbacks:] + 1260
15 UIKit 6553926412 -[UIWindow _setRotatableClient:toOrientation:applyTransformToWindow:updateStatusBar:duration:force:isRotating:] + 360
16 UIKit 6551563312 -[UIWindow _setRotatableViewOrientation:updateStatusBar:duration:force:] + 144
17 UIKit 6551529112 __57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke + 128
18 UIKit 6551053184 -[UIWindow _updateToInterfaceOrientation:duration:force:] + 400
19 UIKit 6551051872 -[UIWindow _updateInterfaceOrientationFromDeviceOrientation:] + 332
20 CoreFoundation 6472590020 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20
21 CoreFoundation 6471791696 _CFXNotificationPost + 2060
22 Foundation 6487714432 -[NSNotificationCenter postNotificationName:object:userInfo:] + 72
23 UIKit 6551051060 -[UIDevice setOrientation:animated:] + 360
24 UIKit 6551050224 -[UIApplication handleEvent:withNewEvent:] + 1632
25 UIKit 6551048320 -[UIApplication sendEvent:] + 104
26 UIKit 6551491268 _UIApplicationHandleEvent + 700
27 GraphicsServices 6633656724 _PurpleEventCallback + 712
28 GraphicsServices 6633655428 PurpleEventCallback + 44
29 CoreFoundation 6472661588 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56
30 CoreFoundation 6472661428 __CFRunLoopDoSource1 + 436
31 CoreFoundation 6472653108 __CFRunLoopRun + 1640
32 CoreFoundation 6471783124 CFRunLoopRunSpecific + 396
33 GraphicsServices 6633649916 GSEventRunModal + 168
34 UIKit 6551465792 UIApplicationMain + 1488
35 project_name 4298267384 main + 108 (main.m:18)
36 libdyld.dylib 6778251784 start + 4
答案 0 :(得分：0)
转到＆＃34; Breakpoint navigator＆＃34;然后点击＆＃34; +＆＃34;左下角的按钮，然后选择＆＃34;添加异常断点...＆＃34;。
这种断点捕获所有异常，因此您可以在左侧导航堆栈错误并找出发生的情况。