在 iOS 7 上崩溃：[NSConcreteMapTable assign:key:value:isNew:]
Crash on iOS 7: [NSConcreteMapTable assign:key:value:isNew:]
我在崩溃日志中得到了下一行：
[NSConcreteMapTable assign:key:value:isNew:]
此崩溃发生在 iOS 7，但不会发生在 iOS 8.
在此行之前的某处调用了 NSLayoutConstraint：
-[NSLayoutConstraint _addLoweredExpression:toEngine:integralizationAdjustment:lastLoweredConstantWasRounded:mutuallyExclusiveConstraints:]
-[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:]
-[NSLayoutConstraint _addToEngine:]
大家觉得这次崩溃和我设置的Storyboard布局约束有关系吗？
Thread : Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x3b46d626 objc_msgSend + 5
1 Foundation 0x315da681 -[NSConcreteMapTable assign:key:value:isNew:] + 68
2 Foundation 0x315da5fb -[NSConcreteMapTable setObject:forKey:] + 82
3 Foundation 0x3161daf7 -[NSISEngine setRowWithHead:body:] + 30
4 Foundation 0x316205d1 -[NSISEngine pivotToMakeBodyVar:newHeadOfRowWithHead:andDropRow:] + 388
5 Foundation 0x3161e325 -[NSISEngine minimizeConstantInObjectiveRowWithHead:] + 236
6 Foundation 0x31620d9f -[NSISEngine tryUsingArtificialVariableToAddConstraintWithMarker:rowBody:usingInfeasibilityHandlingBehavior:mutuallyExclusiveConstraints:] + 226
7 Foundation 0x3161c5fd -[NSISEngine tryToAddConstraintWithMarker:expression:integralizationAdjustment:mutuallyExclusiveConstraints:] + 692
8 Foundation 0x3161c23b -[NSLayoutConstraint _addLoweredExpression:toEngine:integralizationAdjustment:lastLoweredConstantWasRounded:mutuallyExclusiveConstraints:] + 286
9 Foundation 0x31619f6d -[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:] + 232
10 Foundation 0x316257ed -[NSLayoutConstraint _addToEngine:] + 28
11 UIKit 0x335c2c55 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 332
12 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
13 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
14 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
15 UIKit 0x335c2bbb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 178
16 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
17 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
18 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
19 UIKit 0x335c2bbb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 178
20 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
21 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
22 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
23 UIKit 0x335c2bbb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 178
24 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
25 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
26 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
27 UIKit 0x334cee33 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 82
28 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
29 UIKit 0x334cecd3 -[UIView(Hierarchy) _postMovedFromSuperview:] + 298
30 UIKit 0x334dba4f -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1414
31 UIKit 0x334db4bf -[UIView(Hierarchy) addSubview:] + 30
32 UIKit 0x335bcdb7 -[UITransitionView transition:fromView:toView:removeFromView:] + 978
33 UIKit 0x335fcf3f -[UITransitionView transition:fromView:toView:] + 30
34 UIKit 0x335fcf15 -[UITransitionView transition:toView:] + 104
35 UIKit 0x335fc03b -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 1106
36 UIKit 0x335fbbdf -[UITabBarController transitionFromViewController:toViewController:] + 38
37 UIKit 0x335fbab7 -[UITabBarController _setSelectedViewController:] + 258
38 UIKit 0x336c5dd5 -[UITabBarController _tabBarItemClicked:] + 272
39 UIKit 0x33505037 -[UIApplication sendAction:to:from:forEvent:] + 90
40 UIKit 0x33504fd7 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
41 UIKit 0x336c5c8b -[UITabBar _sendAction:withEvent:] + 370
42 UIKit 0x33505037 -[UIApplication sendAction:to:from:forEvent:] + 90
43 UIKit 0x33504fd7 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
44 UIKit 0x33504fb1 -[UIControl sendAction:to:forEvent:] + 44
45 UIKit 0x334f0717 -[UIControl _sendActionsForEvents:withEvent:] + 374
46 Foundation 0x31693163 __NSFireDelayedPerform + 414
47 CoreFoundation 0x30c7e167 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 14
48 CoreFoundation 0x30c7dd7f __CFRunLoopDoTimer + 782
49 CoreFoundation 0x30c7c11b __CFRunLoopRun + 1210
50 CoreFoundation 0x30be6ebf CFRunLoopRunSpecific + 522
51 CoreFoundation 0x30be6ca3 CFRunLoopRunInMode + 106
52 GraphicsServices 0x35aec663 GSEventRunModal + 138
53 UIKit 0x3353314d UIApplicationMain + 1136
好像你在使用 iOS 8 only constraints 转到故事板在左上角打开它你会看到一个带有阅读标记的黄色小图标按下它并搜索 iOS8 只有警告，如果您发现任何警告，请删除这些限制并重建您的应用程序。
我在崩溃日志中得到了下一行： [NSConcreteMapTable assign:key:value:isNew:] 此崩溃发生在 iOS 7，但不会发生在 iOS 8.
在此行之前的某处调用了 NSLayoutConstraint：
-[NSLayoutConstraint _addLoweredExpression:toEngine:integralizationAdjustment:lastLoweredConstantWasRounded:mutuallyExclusiveConstraints:]
-[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:]
-[NSLayoutConstraint _addToEngine:]
大家觉得这次崩溃和我设置的Storyboard布局约束有关系吗？
Thread : Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x3b46d626 objc_msgSend + 5
1 Foundation 0x315da681 -[NSConcreteMapTable assign:key:value:isNew:] + 68
2 Foundation 0x315da5fb -[NSConcreteMapTable setObject:forKey:] + 82
3 Foundation 0x3161daf7 -[NSISEngine setRowWithHead:body:] + 30
4 Foundation 0x316205d1 -[NSISEngine pivotToMakeBodyVar:newHeadOfRowWithHead:andDropRow:] + 388
5 Foundation 0x3161e325 -[NSISEngine minimizeConstantInObjectiveRowWithHead:] + 236
6 Foundation 0x31620d9f -[NSISEngine tryUsingArtificialVariableToAddConstraintWithMarker:rowBody:usingInfeasibilityHandlingBehavior:mutuallyExclusiveConstraints:] + 226
7 Foundation 0x3161c5fd -[NSISEngine tryToAddConstraintWithMarker:expression:integralizationAdjustment:mutuallyExclusiveConstraints:] + 692
8 Foundation 0x3161c23b -[NSLayoutConstraint _addLoweredExpression:toEngine:integralizationAdjustment:lastLoweredConstantWasRounded:mutuallyExclusiveConstraints:] + 286
9 Foundation 0x31619f6d -[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:] + 232
10 Foundation 0x316257ed -[NSLayoutConstraint _addToEngine:] + 28
11 UIKit 0x335c2c55 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 332
12 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
13 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
14 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
15 UIKit 0x335c2bbb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 178
16 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
17 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
18 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
19 UIKit 0x335c2bbb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 178
20 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
21 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
22 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
23 UIKit 0x335c2bbb __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 178
24 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
25 UIKit 0x335c2ad9 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 336
26 UIKit 0x334cf20d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 200
27 UIKit 0x334cee33 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 82
28 Foundation 0x31619b2b -[NSISEngine withBehaviors:performModifications:] + 210
29 UIKit 0x334cecd3 -[UIView(Hierarchy) _postMovedFromSuperview:] + 298
30 UIKit 0x334dba4f -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1414
31 UIKit 0x334db4bf -[UIView(Hierarchy) addSubview:] + 30
32 UIKit 0x335bcdb7 -[UITransitionView transition:fromView:toView:removeFromView:] + 978
33 UIKit 0x335fcf3f -[UITransitionView transition:fromView:toView:] + 30
34 UIKit 0x335fcf15 -[UITransitionView transition:toView:] + 104
35 UIKit 0x335fc03b -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 1106
36 UIKit 0x335fbbdf -[UITabBarController transitionFromViewController:toViewController:] + 38
37 UIKit 0x335fbab7 -[UITabBarController _setSelectedViewController:] + 258
38 UIKit 0x336c5dd5 -[UITabBarController _tabBarItemClicked:] + 272
39 UIKit 0x33505037 -[UIApplication sendAction:to:from:forEvent:] + 90
40 UIKit 0x33504fd7 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
41 UIKit 0x336c5c8b -[UITabBar _sendAction:withEvent:] + 370
42 UIKit 0x33505037 -[UIApplication sendAction:to:from:forEvent:] + 90
43 UIKit 0x33504fd7 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
44 UIKit 0x33504fb1 -[UIControl sendAction:to:forEvent:] + 44
45 UIKit 0x334f0717 -[UIControl _sendActionsForEvents:withEvent:] + 374
46 Foundation 0x31693163 __NSFireDelayedPerform + 414
47 CoreFoundation 0x30c7e167 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 14
48 CoreFoundation 0x30c7dd7f __CFRunLoopDoTimer + 782
49 CoreFoundation 0x30c7c11b __CFRunLoopRun + 1210
50 CoreFoundation 0x30be6ebf CFRunLoopRunSpecific + 522
51 CoreFoundation 0x30be6ca3 CFRunLoopRunInMode + 106
52 GraphicsServices 0x35aec663 GSEventRunModal + 138
53 UIKit 0x3353314d UIApplicationMain + 1136
好像你在使用 iOS 8 only constraints 转到故事板在左上角打开它你会看到一个带有阅读标记的黄色小图标按下它并搜索 iOS8 只有警告，如果您发现任何警告，请删除这些限制并重建您的应用程序。