我们正在崩溃＆＃34; NSString quotedStringRepresentation＆＃34;通常是生产构建。我看到了上一篇文章中给出的答案，但是他们没有帮助我。有人可以帮忙吗？这是日志：
# Platform: ios
# Application:
# Version: N/A
# Date: 2017-03-23T06:48:38Z
# OS Version: 10.2.1 (14D27)
# Device: iPad Pro (12.9 inch)
# RAM Free: 20.3%
# Disk Free: 80.4%
#0. Crashed: com.apple.main-thread
0 libsystem_kernel.dylib 0x18d1c7014 __pthread_kill + 8
1 libsystem_pthread.dylib 0x18d28f450 pthread_kill + 112
2 libsystem_c.dylib 0x18d13b400 abort + 140
3 libsystem_malloc.dylib 0x18d20ba5c _nano_vet_and_size_of_live + 330
4 libsystem_malloc.dylib 0x18d20cf18 nano_realloc + 376
5 libsystem_malloc.dylib 0x18d1ff240 malloc_zone_realloc + 180
6 Foundation 0x18ec4a628 -[NSString quotedStringRepresentation] + 732
7 Foundation 0x18ec2a44c -[NSString _stringRepresentation] + 376
8 CoreFoundation 0x18e121f3c -[NSArray descriptionWithLocale:indent:] + 404
9 Foundation 0x18ec04af4 _NSDescriptionWithLocaleFunc + 76
10 CoreFoundation 0x18e1ba23c __CFStringAppendFormatCore + 7996
11 CoreFoundation 0x18e1b82c8 _CFStringCreateWithFormatAndArgumentsAux2 + 244
12 Foundation 0x18ec04968 +[NSString stringWithFormat:] + 68
13 UIKit 0x1949fc090 UIViewAlertForUnsatisfiableConstraints + 664
14 Foundation 0x18ec794cc -[NSISEngine handleUnsatisfiableRowWithHead:body:usingInfeasibilityHandlingBehavior:mutuallyExclusiveConstraints:] + 464
15 Foundation 0x18ec59df8 -[NSISEngine tryUsingArtificialVariableToAddConstraintWithMarker:rowBody:usingInfeasibilityHandlingBehavior:mutuallyExclusiveConstraints:] + 384
16 Foundation 0x18ec559c4 -[NSISEngine tryToAddConstraintWithMarker:expression:integralizationAdjustment:mutuallyExclusiveConstraints:] + 688
17 Foundation 0x18ec555cc -[NSLayoutConstraint _addLoweredExpression:toEngine:integralizationAdjustment:lastLoweredConstantWasRounded:mutuallyExclusiveConstraints:] + 284
18 Foundation 0x18ec531e0 -[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:] + 272
19 UIKit 0x1941a7400 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 396
20 Foundation 0x18ec52d10 -[NSISEngine withBehaviors:performModifications:] + 168
21 UIKit 0x1941a720c __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 564
22 UIKit 0x1940a3b14 -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 224
23 UIKit 0x1941e4cf0 -[UIView(AdditionalLayoutSupport) _initializeHostedLayoutEngine] + 460
24 UIKit 0x1941aed34 -[UIView(UIConstraintBasedLayout) _layoutEngine_windowDidChange] + 132
25 UIKit 0x1940a3c10 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 200
26 UIKit 0x1940a3e18 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 720
27 UIKit 0x1940a32c4 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 156
28 Foundation 0x18ec52d10 -[NSISEngine withBehaviors:performModifications:] + 168
29 UIKit 0x1940a3138 -[UIView(Hierarchy) _postMovedFromSuperview:] + 820
30 UIKit 0x1940af018 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1788
31 UIKit 0x1940ae904 -[UIView(Hierarchy) addSubview:] + 828
32 UIKit 0x19416abc8 -[UINavigationTransitionView transition:fromView:toView:] + 624
33 UIKit 0x194160e5c -[UINavigationController _startTransition:fromViewController:toViewController:] + 2572
34 UIKit 0x19415ff28 -[UINavigationController _startDeferredTransitionIfNeeded:] + 856
35 UIKit 0x19415fadc -[UINavigationController __viewWillLayoutSubviews] + 64
36 UIKit 0x19415fa40 -[UILayoutContainerView layoutSubviews] + 188
37 UIKit 0x1940a4a80 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1196
38 QuartzCore 0x1915529d8 -[CALayer layoutSublayers] + 148
39 QuartzCore 0x1915474cc CA::Layer::layout_if_needed(CA::Transaction*) + 292
40 QuartzCore 0x19154738c CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 32
41 QuartzCore 0x1914c43e0 CA::Context::commit_transaction(CA::Transaction*) + 252
42 QuartzCore 0x1914eba68 CA::Transaction::commit() + 512
43 UIKit 0x19432a864 _UIApplicationFlushRunLoopCATransactionIfTooLate + 208
44 UIKit 0x19488bfa4 __handleEventQueue + 4484
45 CoreFoundation 0x18e1a6b5c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
46 CoreFoundation 0x18e1a64a4 __CFRunLoopDoSources0 + 524
47 CoreFoundation 0x18e1a40a4 __CFRunLoopRun + 804
48 CoreFoundation 0x18e0d22b8 CFRunLoopRunSpecific + 444
49 GraphicsServices 0x18fb86198 GSEventRunModal + 180
50 UIKit 0x1941127fc -[UIApplication _run] + 684
51 UIKit 0x19410d534 UIApplicationMain + 208
52 DiabetesMD 0x100015f20 main (AppDelegate.swift:15)
53 libdispatch.dylib 0x18d0b55b8 (Missing)