崩溃日志如下。
您知道可能[UIScrollView removeFromSuperview]
会崩溃的任何特定原因吗?滚动视图包含具有不同类型的视图层次结构UIViews
。我还发现临时版本崩溃通常不是调试版本。我找不到任何理由。
相同的视图控制器在 iPhone 的不同流程中加载,工作正常。但在 iPad 中它崩溃了。在 iPad 中,在容器视图控制器中,仅加载 viewcontroler.view。
Incident Identifier: EE102239-34D1-4BE7-8B52-41F74AB26203
CrashReporter Key: 2b11ea2a01ac5618e199ffc5a1e1f321600bb6a9
Hardware Model: iPad3,4
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2013-06-18 15:19:16.132 +0200
OS Version: iOS 6.1.3 (10B329)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000000
Crashed Thread: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libobjc.A.dylib 0x3bab7070 prepareForMethodLookup + 20
1 libobjc.A.dylib 0x3bab6fb2 lookUpMethod + 42
2 libobjc.A.dylib 0x3bab6f7e _class_lookupMethodAndLoadCache3 + 14
3 libobjc.A.dylib 0x3bab6638 objc_msgSend_uncached + 24
4 QuartzCore 0x357f2a72 CA::Layer::contents_visibility_changed(CA::Transaction*, bool) + 50
5 QuartzCore 0x357f29de CA::Layer::mark_visible(CA::Transaction*, bool) + 190
6 QuartzCore 0x357f29b2 CA::Layer::mark_visible(CA::Transaction*, bool) + 146
7 QuartzCore 0x357f29b2 CA::Layer::mark_visible(CA::Transaction*, bool) + 146
8 QuartzCore 0x357f29b2 CA::Layer::mark_visible(CA::Transaction*, bool) + 146
9 QuartzCore 0x357f29b2 CA::Layer::mark_visible(CA::Transaction*, bool) + 146
10 QuartzCore 0x357f28d2 CA::Layer::update_removed_sublayer(CA::Transaction*, unsigned int) + 18
11 QuartzCore 0x357f255a CA::Layer::remove_sublayer(CA::Transaction*, CALayer*) + 130
12 QuartzCore 0x357f246a CA::Layer::remove_from_superlayer() + 34
13 UIKit 0x35a6e92c -[UIView(Hierarchy) removeFromSuperview] + 144
14 UIKit 0x35b857bc -[UIScrollView removeFromSuperview] + 60
15 MyApp 0x000bde8a -[iPadNavigationController vcAnimationDone] (iPadNavigationController.m:400)
16 UIKit 0x35a55ab6 -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 154
17 UIKit 0x35aca8f8 -[UIViewAnimationState animationDidStop:finished:] + 44
18 QuartzCore 0x35801304 CA::Layer::run_animation_callbacks(void*) + 204
19 libdispatch.dylib 0x3bed55d8 _dispatch_client_callout + 20
20 libdispatch.dylib 0x3bed8e40 _dispatch_main_queue_callback_4CF + 224
21 CoreFoundation 0x33c051ac __CFRunLoopRun + 1284
22 CoreFoundation 0x33b78238 CFRunLoopRunSpecific + 352
23 CoreFoundation 0x33b780c4 CFRunLoopRunInMode + 100
24 GraphicsServices 0x37733336 GSEventRunModal + 70
25 UIKit 0x35a942b4 UIApplicationMain + 1116
代码中的几行(按要求),
previous = showing;
showing = [ vc retain ];
showing.view.frame = startFrameIn;
[ container addSubview:showing.view ];
CGContextRef context = UIGraphicsGetCurrentContext();
[ UIView beginAnimations:nil context:context ];
[ UIView setAnimationDelegate:self ];
[ UIView setAnimationDidStopSelector:@selector(vcAnimationDone) ];
[ UIView setAnimationCurve:UIViewAnimationCurveEaseOut ];
[ UIView setAnimationDuration:0.4 ];
previous.view.frame = endFrameOut;
showing.view.frame = detailFrame;
[ UIView commitAnimations ];
}
- (void) vcAnimationDone {
if ( previous != nil ) {
if (previous.view.superview != nil) {
[previous.view removeFromSuperview];
}
[ previous release ];
previous = nil;
}