我遇到一個非常奇怪的崩潰,這裏是回溯。奇怪的崩潰時解僱視圖控制器,自動佈局的責任?
* thread #1: tid = 0x2403, 0x3379516c CoreFoundation`CFHash + 8, stop reason = EXC_BREAKPOINT (code=EXC_ARM_BREAKPOINT, subcode=0xdefe)
frame #0: 0x3379516c CoreFoundation`CFHash + 8
frame #1: 0x33797a9c CoreFoundation`CFBasicHashRemoveValue + 1408
frame #2: 0x337974ee CoreFoundation`CFDictionaryRemoveValue + 166
frame #3: 0x3420988e Foundation`-[NSISEngine removeConstraintWithMarker:] + 562
frame #4: 0x34211dbe Foundation`-[NSLayoutConstraint _removeFromEngine:] + 230
frame #5: 0x35a954ec UIKit`-[UIView(UIConstraintBasedLayout) _layoutEngine_willRemoveLayoutConstraint:] + 44
frame #6: 0x358488fc UIKit`__48-[UIScrollView _setAutomaticContentConstraints:]_block_invoke_0 + 148
frame #7: 0x34208882 Foundation`-[NSISEngine withAutomaticOptimizationDisabled:] + 166
frame #8: 0x35848838 UIKit`-[UIScrollView _setAutomaticContentConstraints:] + 116
frame #9: 0x35848e6c UIKit`-[UIScrollView _rememberDependentConstraint:] + 112
frame #10: 0x35a9e3ae UIKit`___updateViewDependenciesForConstraint_block_invoke_0 + 30
frame #11: 0x35a954ba UIKit`_updateViewDependenciesForConstraint + 202
frame #12: 0x35a953da UIKit`-[UIView(UIConstraintBasedLayout) _layoutEngine_didAddLayoutConstraint:roundingAdjustment:mutuallyExclusiveConstraints:] + 154
frame #13: 0x35a95534 UIKit`-[UIView(UIConstraintBasedLayout) _tryToAddConstraintWithoutUpdatingConstraintsArray:roundingAdjustment:mutuallyExclusiveConstraints:] + 36
frame #14: 0x3567c2e0 UIKit`-[UIView(Internal) _didMoveFromWindow:toWindow:] + 376
frame #15: 0x356d34fe UIKit`-[UIScrollView _didMoveFromWindow:toWindow:] + 50
frame #16: 0x3567c5c6 UIKit`-[UIView(Internal) _didMoveFromWindow:toWindow:] + 1118
frame #17: 0x35676e52 UIKit`-[UIView(Hierarchy) _postMovedFromSuperview:] + 138
frame #18: 0x3565e7dc UIKit`-[UIView(Internal) _addSubview:positioned:relativeTo:] + 1300
frame #19: 0x3565e2c2 UIKit`-[UIView(Hierarchy) addSubview:] + 30
frame #20: 0x356f68e8 UIKit`-[UITransitionView transition:fromView:toView:removeFromView:] + 972
frame #21: 0x35937618 UIKit`__91-[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:]_block_invoke_0238 + 388
frame #22: 0x357499b8 UIKit`-[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:] + 4824
frame #23: 0x357b9814 UIKit`-[UIViewController _dismissViewControllerWithTransition:from:completion:] + 1708
frame #24: 0x357057c4 UIKit`-[UIViewController dismissViewControllerWithTransition:completion:] + 912
frame #25: 0x000ccd40 Capture`-[INFTagSearchViewController cancelButtonTouched:](self=0x1f09ed50, _cmd=0x001b9d5f, sender=0x1e0265c0) + 76 at INFTagSearchViewController.m:48
frame #26: 0x357470c4 UIKit`-[UIApplication sendAction:to:from:forEvent:] + 72
frame #27: 0x35747076 UIKit`-[UIApplication sendAction:toTarget:fromSender:forEvent:] + 30
frame #28: 0x35747054 UIKit`-[UIControl sendAction:to:forEvent:] + 44
frame #29: 0x3574690a UIKit`-[UIControl(Internal) _sendActionsForEvents:withEvent:] + 502
frame #30: 0x35746e00 UIKit`-[UIControl touchesEnded:withEvent:] + 488
frame #31: 0x3566f5f0 UIKit`-[UIWindow _sendTouchesForEvent:] + 524
frame #32: 0x3565c800 UIKit`-[UIApplication sendEvent:] + 380
frame #33: 0x3565c11a UIKit`_UIApplicationHandleEvent + 6154
frame #34: 0x373655a2 GraphicsServices`_PurpleEventCallback + 590
frame #35: 0x373651d2 GraphicsServices`PurpleEventCallback + 34
frame #36: 0x33829172 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
frame #37: 0x33829116 CoreFoundation`__CFRunLoopDoSource1 + 138
frame #38: 0x33827f98 CoreFoundation`__CFRunLoopRun + 1384
frame #39: 0x3379aebc CoreFoundation`CFRunLoopRunSpecific + 356
frame #40: 0x3379ad48 CoreFoundation`CFRunLoopRunInMode + 104
frame #41: 0x373642ea GraphicsServices`GSEventRunModal + 74
frame #42: 0x356b0300 UIKit`UIApplicationMain + 1120
frame #43: 0x000a297c Capture`main(argc=1, argv=0x2fd60cfc) + 116 at main.m:16
frame #44: 0x3bb2bb20 libdyld.dylib`start + 4
你會注意到架25只叫我的代碼做,這是cancelButtonTouched
它看起來像。
- (IBAction)cancelButtonTouched:(id)sender {
[self dismissViewControllerAnimated:YES completion:nil];
}
我很茫然,什麼是怎麼回事,我從來沒有過這樣的前一個問題,基於該系統調用它似乎是一個自動佈局問題。我證實在崩潰發生之前viewWillApper在呈現視圖控制器上被調用,所以我認爲它是呈現視圖的佈局期間的發佈。
關於如何將此問題縮小到特定佈局約束的任何想法?還是其他想法?
這是可以在一些設備上重現,而在其他設備上,它很少會發生。所以它是間歇性的。
更新
截圖斷點。
更新2
所以它肯定是解僱的presentingViewController
,駁回兩個層面的問題深([self.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:nil]
)工作正常,但顯然不是理想的結果,我只是想回去1級。這進一步導致我相信有一個問題「重新佈置」出來。
你有Objective-C異常的斷點嗎?如果是這樣,如果在代碼被擊中後繼續執行,會發生什麼? Autolayout在違反約束條件時拋出異常,但在引發異常之前不會記錄實際錯誤。 – frozendevil 2013-03-26 00:52:04
是的,但是它停止在打開或不打開斷點的同一點。繼續沒有做什麼,只是繼續在同一個地方。附上一個截圖,其中的內容與文中發佈的內容相同。 – 2013-03-26 16:51:18
此外,我沒有看到正常的自動佈局調試消息有關不需要的限制等... – 2013-03-26 16:53:06