在iOS 7上呈现模态视图控制器时出现了一个奇怪的崩溃，它只发生在iPhone 5C上我无法在iPhone 5或5s上重现。我已经附上了下面的崩溃日志，以及显示视图控制器的代码。我使用呈现视图控制器作为转换委托，以实现自定义淡入淡出。如果您需要更多相关信息，请与我们联系。
代码：
PresentedViewController *vc = [[PresentedViewController alloc] init];
vc.transitioningDelegate = self;
vc.modalPresentationStyle = UIModalPresentationCustom;
[self presentViewController:vc animated:YES completion:nil];
崩溃日志：
Incident Identifier: 161D4D3E-146F-4CC6-A13C-66BF6305942F
CrashReporter Key: DCFCE3DE-6815-4EA6-85A5-AD5006E34125
Hardware Model: iPhone5,3
Process: AppName [10236]
Path: /Users/USER/AppName.app/AppName
Identifier: com.appname
Version: 4
Code Type: ARM
Parent Process: launchd [1]
Date/Time: 2014-09-02T20:31:52Z
OS Version: iPhone OS 7.0.4 (11B554a)
Report Version: 104
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0xb006dbcc
Crashed Thread: 0
Application Specific Information:
Selector name found in current argument registers: isHeaderFlaggedFPO
Thread 0 Crashed:
0 libobjc.A.dylib 0x395c277a lookUpImpOrForward + 46
1 libobjc.A.dylib 0x395bb02b _class_lookupMethodAndLoadCache3 + 32
2 libobjc.A.dylib 0x395badf9 _objc_msgSend_uncached + 22
3 CoreUI 0x3339bd0d -[CUIStructuredThemeStore renditionWithKey:] + 1050
4 CoreUI 0x333a50af -[CUINamedImage _renditionForSpecificKey:] + 168
5 CoreUI 0x333a50fd -[CUINamedImage image] + 18
6 UIKit 0x31a02c01 -[_UIAssetManager imageNamed:scale:idiom:subtype:cachingOptions:] + 258
7 UIKit 0x31a02af7 -[_UIAssetManager imageNamed:scale:idiom:subtype:] + 36
8 UIKit 0x31a02acd -[_UIAssetManager imageNamed:idiom:subtype:] + 42
9 UIKit 0x31a02a9b -[_UIAssetManager imageNamed:idiom:] + 44
10 UIKit 0x31d47ab1 -[UIImageNibPlaceholder initWithCoder:] + 286
11 UIKit 0x31ddd1d9 UINibDecoderDecodeObjectForValue + 738
12 UIKit 0x31ddceef -[UINibDecoder decodeObjectForKey:] + 88
13 UIKit 0x31cb61db -[UIImageView initWithCoder:] + 88
14 UIKit 0x31ddd1d9 UINibDecoderDecodeObjectForValue + 738
15 UIKit 0x31ddd179 UINibDecoderDecodeObjectForValue + 642
16 UIKit 0x31ddceef -[UINibDecoder decodeObjectForKey:] + 88
17 UIKit 0x31c7996d -[UIView initWithCoder:] + 650
18 UIKit 0x31ddd1d9 UINibDecoderDecodeObjectForValue + 738
19 UIKit 0x31ddd179 UINibDecoderDecodeObjectForValue + 642
20 UIKit 0x31ddceef -[UINibDecoder decodeObjectForKey:] + 88
21 UIKit 0x31c7996d -[UIView initWithCoder:] + 650
22 UIKit 0x31ddd1d9 UINibDecoderDecodeObjectForValue + 738
23 UIKit 0x31ddceef -[UINibDecoder decodeObjectForKey:] + 88
24 UIKit 0x31d46c1f -[UIRuntimeConnection initWithCoder:] + 148
25 UIKit 0x31ddd1d9 UINibDecoderDecodeObjectForValue + 738
26 UIKit 0x31ddd179 UINibDecoderDecodeObjectForValue + 642
27 UIKit 0x31ddceef -[UINibDecoder decodeObjectForKey:] + 88
28 UIKit 0x31d463f5 -[UINib instantiateWithOwner:options:] + 886
29 UIKit 0x31ca80fb -[UIViewController _loadViewFromNibNamed:bundle:] + 232
30 UIKit 0x31b09b59 -[UIViewController loadView] + 90
31 UIKit 0x319eb79d -[UIViewController loadViewIfRequired] + 70
32 UIKit 0x319eb719 -[UIViewController view] + 22
33 UIKit 0x31a955cf -[UIViewController shouldAutorotate] + 24
34 UIKit 0x31ad1c97 -[UIViewController _preferredInterfaceOrientationForPresentationInWindow:fromInterfaceOrientation:] + 248
35 UIKit 0x31ad05c5 -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:animation:] + 2058
36 UIKit 0x31acf631 -[UIViewController presentViewController:withTransition:completion:] + 4674
37 AppName 0x000c4b9d -[PresentingViewController storePurchaseSuccessWithType:andUser:] (PresentingViewController.m:221)
38 AppName 0x000c5179 __54-[PresentingViewController alertView:clickedButtonAtIndex:]_block_invoke (PresentingViewController.m:245)
39 AppName 0x00225687 -[RACSubscriber sendNext:] (RACSubscriber.m:73)
40 AppName 0x0020d447 -[RACPassthroughSubscriber sendNext:] (RACPassthroughSubscriber.m:74)
41 AppName 0x00225687 -[RACSubscriber sendNext:] (RACSubscriber.m:73)
42 AppName 0x0020eda1 __29-[RACReturnSignal subscribe:]_block_invoke (RACReturnSignal.m:85)
43 AppName 0x00225f15 -[RACSubscriptionScheduler schedule:] (RACSubscriptionScheduler.m:40)
44 AppName 0x0020ed37 -[RACReturnSignal subscribe:] (RACReturnSignal.m:84)
45 AppName 0x00220aa5 -[RACSignal(Subscription) subscribeNext:error:completed:] (RACSignal.m:302)
46 AppName 0x0021f2df __29-[RACSignal(RACStream) bind:]_block_invoke76 (RACSignal.m:139)
47 AppName 0x0021f521 __29-[RACSignal(RACStream) bind:]_block_invoke113 (RACSignal.m:165)
48 AppName 0x00225687 -[RACSubscriber sendNext:] (RACSubscriber.m:73)
49 AppName 0x0020d447 -[RACPassthroughSubscriber sendNext:] (RACPassthroughSubscriber.m:74)
50 AppName 0x0020d447 -[RACPassthroughSubscriber sendNext:] (RACPassthroughSubscriber.m:74)
51 AppName 0x00224ccd -[RACSubject enumerateSubscribersUsingBlock:] (RACSubject.m:85)
52 AppName 0x00224dad -[RACSubject sendNext:] (RACSubject.m:92)
53 AppName 0x0020e65d -[RACReplaySubject sendNext:] (RACReplaySubject.m:89)
54 AppName 0x0008fa3d __71-[AFURLConnectionOperation(RACSupport) rac_overrideHTTPCompletionBlock]_block_invoke (AFURLConnectionOperation+RACSupport.m:42)
55 libdispatch.dylib 0x39aa40c3 _dispatch_call_block_and_release + 8
56 libdispatch.dylib 0x39aa40af _dispatch_client_callout + 20
57 libdispatch.dylib 0x39aa69a9 _dispatch_main_queue_callback_4CF + 266
58 CoreFoundation 0x2f22d5b1 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 6
59 CoreFoundation 0x2f22be7d __CFRunLoopRun + 1306
60 CoreFoundation 0x2f196471 CFRunLoopRunSpecific + 522
61 CoreFoundation 0x2f196253 CFRunLoopRunInMode + 104
62 GraphicsServices 0x33ed02eb GSEventRunModal + 136
63 UIKit 0x31a4b845 UIApplicationMain + 1134
64 AppName 0x000ab367 main (main.m:16)
65 libdyld.dylib 0x39ab8ab7 start + 0