我在导航堆栈上推送一个viewController，当我到达下一个视图并返回然后重新启动视图时，它会在崩溃中结束... 这是代码..
SampleViewController *obj=[[SampleViewController alloc]initWithNibName:nil bundle:nil];
obj.delegate=self;
self.title=@"TESTT";
[self.navigationController pushViewController:obj animated:YES];
[obj release];
但是如果我将obj设为全局，那么崩溃就不会发生......我知道它很常见，但我无法弄明白。
崩溃日志..
Process: INGDirectOCRSampleApp [4940]
Path: /Users/chetna368474/Library/Application Support/iPhone Simulator/5.0/Applications/88310229-D5BA-4B1B-BBE2-F49E1C35CD25/INGDirectOCRSampleApp.app/INGDirectOCRSampleApp
Identifier: INGDirectOCRSampleApp
Version: ??? (???)
Code Type: X86 (Native)
Parent Process: launchd [1193]
Date/Time: 2012-04-06 17:48:00.057 +0530
OS Version: Mac OS X 10.6.8 (10K549)
Report Version: 6
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
Crashed Thread: 0
Application Specific Information:
objc_msgSend() selector name: release
iPhone Simulator 272, iPhone OS 5.0 (iPhone/9A334)
Thread 0 Crashed:
0 libobjc.A.dylib 0x0192209f objc_msgSend + 19
1 CoreFoundation 0x01b30435 CFRelease + 117
2 CoreFoundation 0x01c11e94 -[__NSArrayM dealloc] + 180
3 libobjc.A.dylib 0x01922e4d _objc_rootRelease + 47
4 UIKit 0x008760f9 -[UIView(Internal) _invalidateSubviewCache] + 44
5 UIKit 0x0087142f __UIViewWillBeRemovedFromSuperview + 689
6 UIKit 0x008710d7 -[UIView(Hierarchy) removeFromSuperview] + 70
7 UIKit 0x0086d1e0 -[UIView dealloc] + 309
8 libobjc.A.dylib 0x01922e4d _objc_rootRelease + 47
9 libobjc.A.dylib 0x01922e10 objc_release + 48
10 libobjc.A.dylib 0x01923c60 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 528
11 CoreFoundation 0x01b58ed8 _CFAutoreleasePoolPop + 24
12 CoreFoundation 0x01b5b83b __CFRunLoopRun + 2011
13 CoreFoundation 0x01b5adb4 CFRunLoopRunSpecific + 212
14 CoreFoundation 0x01b5accb CFRunLoopRunInMode + 123
15 GraphicsServices 0x0225e879 GSEventRunModal + 207
16 GraphicsServices 0x0225e93e GSEventRun + 114
17 UIKit 0x0083aa9b UIApplicationMain + 1175
18 INGDirectOCRSampleApp 0x0000271d main + 125 (main.m:14)
19 INGDirectOCRSampleApp 0x00002695 start + 53
Thread 1:
0 libSystem.B.dylib 0x994de382 kevent + 10
1 libdispatch.dylib 0x0222f373 _dispatch_mgr_invoke + 918
2 libdispatch.dylib 0x0222dcd0 _dispatch_mgr_wakeup + 0
Thread 2:
0 libSystem.B.dylib 0x994dd412 __workq_kernreturn + 10
1 libSystem.B.dylib 0x994dd9a8 _pthread_wqthread + 941
2 libSystem.B.dylib 0x994dd5c6 start_wqthread + 30
Thread 3:
0 libSystem.B.dylib 0x994dd5a8 start_wqthread + 0
Thread 4: WebThread
0 libSystem.B.dylib 0x994b7afa mach_msg_trap + 10
1 libSystem.B.dylib 0x994b8267 mach_msg + 68
2 CoreFoundation 0x01bf813a __CFRunLoopServiceMachPort + 186
3 CoreFoundation 0x01b5b605 __CFRunLoopRun + 1445
4 CoreFoundation 0x01b5adb4 CFRunLoopRunSpecific + 212
5 CoreFoundation 0x01b5accb CFRunLoopRunInMode + 123
6 WebCore 0x03940220 RunWebThread(void*) + 560
7 libSystem.B.dylib 0x994e5259 _pthread_start + 345
8 libSystem.B.dylib 0x994e50de thread_start + 34
Thread 0 crashed with X86 Thread State (32-bit):
eax: 0x08013060 ebx: 0x00000007 ecx: 0x01928405 edx: 0x0800e513
edi: 0x00000000 esi: 0x00000008 ebp: 0xbfffde98 esp: 0xbfffde44
ss: 0x0000001f efl: 0x00010206 eip: 0x0192209f cs: 0x00000017
ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
cr2: 0x00000000
Binary Images:
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0x5f54000 - 0x643dffb +libBLAS.dylib ??? (???) <637EF410-C629-38BF-A00C-89DA9CB8EE64> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libBLAS.dylib
0x646b000 - 0x64dfffb +libvMisc.dylib 348.5.0 (compatibility 1.0.0) <D3E59670-5FC5-381E-B994-21261AFE195D> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libvMisc.dylib
0x64e6000 - 0x6511ff7 +libxslt.1.dylib 3.24.0 (compatibility 3.0.0) <A50B2DC2-A345-3A90-A2D3-F83A3F01B515> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/lib/libxslt.1.dylib
0x651c000 - 0x6523ffb +AggregateDictionary ??? (???) <601ED459-B0C5-3CB6-A2CF-8EF09D68AFFE> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/AggregateDictionary.framework/AggregateDictionary
0x652a000 - 0x6541ffb +DataAccessExpress ??? (???) <9196A8BB-AA0A-3063-8A02-BCAAFF6C793B> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/DataAccessExpress.framework/DataAccessExpress
0x6554000 - 0x6563fff +AccountSettings ??? (???) <AEBCC1A4-213F-3338-AFCB-CA8728FB1134> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/AccountSettings.framework/AccountSettings
0x656d000 - 0x65c8fff +ManagedConfiguration ??? (???) <CAD36AF4-D4EB-3C35-86A3-0F78B971EB9F> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/ManagedConfiguration.framework/ManagedConfiguration
0x6607000 - 0x661bff7 +PersistentConnection ??? (???) <C1674D83-862C-3EEA-8172-0E52ADC900B7> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/PersistentConnection.framework/PersistentConnection
0x662c000 - 0x66a9fff +CoreAudio ??? (???) <9789D4A8-A5EC-318A-AEC0-11A05FCA412C> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreAudio.framework/CoreAudio
0x66e0000 - 0x6742fff +libc++.1.dylib 25.1.0 (compatibility 1.0.0) <D0D81167-0B12-3E7A-9B79-52BBB4498158> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/lib/libc++.1.dylib
0x6798000 - 0x6939ffb +JavaScriptCore 534.46.0 (compatibility 1.0.0) <A6AECBE2-0156-3279-BD6F-A6A951AB904C> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/JavaScriptCore.framework/JavaScriptCore
0x69a7000 - 0x69b1fff +AssetsLibraryServices ??? (???) <9717070C-6F0F-3317-8DC8-2E5689E13343> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices
0x69bc000 - 0x6aacff7 +libiconv.2.dylib 7.0.0 (compatibility 7.0.0) <81D3CF72-871D-3CD7-8A93-A840FA11B5E5> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/lib/libiconv.2.dylib
0x6ab9000 - 0x6ab9ffb +libresolv.dylib 41.0.0 (compatibility 1.0.0) <9CDCBA6B-B685-3E68-8042-DC399A861C08> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/lib/libresolv.dylib
0x6abe000 - 0x6b18ff7 +CoreLocation 1223.3.0 (compatibility 1.0.0) <FA7E83B9-390A-3AB8-A328-C560A4DCAF7D> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreLocation.framework/CoreLocation
0x6b44000 - 0x6ba5ff7 +GeoServices 84.0.0 (compatibility 1.0.0) <BC020B7B-0F36-34EE-A09E-FF695F36FC8B> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/GeoServices.framework/GeoServices
0x6bc8000 - 0x6bccffb +CoreTime ??? (???) <15658E42-14C3-3411-AA11-48930BF4629F> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/CoreTime.framework/CoreTime
0x6bd3000 - 0x6bddfff +ProtocolBuffer 57.0.0 (compatibility 1.0.0) <9DC44A7F-8696-393B-AA50-69E6BC8B177F> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/PrivateFrameworks/ProtocolBuffer.framework/ProtocolBuffer
0x6cae000 - 0x6cd5ff7 +libRIP.A.dylib 600.0.0 (compatibility 64.0.0) <ECC74B2F-3924-3D1C-8715-C5A67E48A490> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreGraphics.framework/Resources/libRIP.A.dylib
0xaf00000 - 0xaf4cffb +libCGFreetype.A.dylib 600.0.0 (compatibility 64.0.0) <5A17326C-7E22-36FB-9200-DF0B9106C194> /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreGraphics.framework/Resources/libCGFreetype.A.dylib
0x8fe00000 - 0x8fe4162b dyld 132.1 (???) <1C06ECD9-A2D7-BB10-AF50-0F2B598A7DEC> /usr/lib/dyld
0x90f05000 - 0x90f62ff7 com.apple.framework.IOKit 2.0 (???) <3DABAB9C-4949-F441-B077-0498F8E47A35> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x95b0d000 - 0x95b10fe7 libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <1622A54F-1A98-2CBE-B6A4-2122981A500E> /usr/lib/system/libmathCommon.A.dylib
0x994b7000 - 0x9965eff7 libSystem.B.dylib 125.2.11 (compatibility 1.0.0) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib
0x9aae7000 - 0x9ab07fe7 libresolv.9.dylib 41.0.0 (compatibility 1.0.0) <BF7FF2F6-5FD3-D78F-77BC-9E2CB2A5E309> /usr/lib/libresolv.9.dylib
0x9abc8000 - 0x9abd4ff7 libkxld.dylib ??? (???) <9A441C48-2D18-E716-5F38-CBEAE6A0BB3E> /usr/lib/system/libkxld.dylib
0xffff0000 - 0xffff1fff libSystem.B.dylib ??? (???) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib
答案 0 :(得分：2)
如果您不能使用NSZombies，我们需要一些猜测才能找到问题...
让p首先将堆栈跟踪颠倒过来。 UIView被取消分配（很可能是self.view）
7 UIKit 0x0086d1e0 -[UIView dealloc] + 309
6 UIKit 0x008710d7 -[UIView(Hierarchy) removeFromSuperview] + 70
5 UIKit 0x0087142f __UIViewWillBeRemovedFromSuperview + 689
4 UIKit 0x008760f9 -[UIView(Internal) _invalidateSubviewCache] + 44
这个UIView发布了它的“subviewCache”（一个NSArray），它被解除分配并向它包含的对象发送一条释放消息。
3 libobjc.A.dylib 0x01922e4d _objc_rootRelease + 47
2 CoreFoundation 0x01c11e94 -[__NSArrayM dealloc] + 180
1 CoreFoundation 0x01b30435 CFRelease + 117
0 libobjc.A.dylib 0x0192209f objc_msgSend + 19
然后应用程序崩溃，因为它很可能尝试释放已经解除分配的对象。
看起来您的某个子视图已过度发布。
在代码中搜索没有alloc但是由您发布的对象。分析仪会帮助你。
检查错误代码：
UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; // <- autoreleased
[self.view addSubview:aButton];
[aButton release]; // <- released again. Wrong!
如果方法不包含alloc，new，copy或retain，则您不得release返回的对象，因为该方法返回自动释放的对象。
答案 1 :(得分：0)
你可以像这段代码那样做
if(obj == nil)
obj=[[SampleViewController alloc]initWithNibName:nil bundle:nil];
obj.delegate=self;
self.title=@"TESTT";
[self.navigationController pushViewController:obj animated:YES];
创建Object Global，在这里你不需要释放对象，下次当遇到这些解决了内存泄漏问题的行时就可以创建它。
答案 2 :(得分：0)
我确信在某些事情发布时发现崩溃你必须在运行应用程序之后注释dealloc函数（在所有viewcontrollers中）中的所有版本，并检查你的app中是否会发现崩溃
一旦你达到这一点，逐一取消注释dealloc功能。你找到了崩溃......
答案 3 :(得分：0)
SampleViewController *obj=[[SampleViewController alloc]init];
obj.delegate=self;
self.title=@"TESTT";
[self.navigationController pushViewController:obj animated:YES];
[obj release];