我遇到一些iPhone应用程序因背景而崩溃的问题，它有两种崩溃方式。
这是一个堆栈跟踪：
Hardware Model: iPhone4,1
Process: MyApp [11247]
Identifier: MyApp
Code Type: ARM (Native)
Parent Process: launchd [1]
OS Version: iPhone OS 5.0.1 (9A406)
Report Version: 104
Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x30938010 0x30937000 + 4112
1 libsystem_kernel.dylib 0x30938206 0x30937000 + 4614
2 liblaunch.dylib 0x3717d114 0x37177000 + 24852
3 liblaunch.dylib 0x3717af4a 0x37177000 + 16202
4 liblaunch.dylib 0x3717affa 0x37177000 + 16378
5 CoreTelephony 0x37c590aa 0x37c42000 + 94378
6 IMAVCore 0x3713d15a 0x3711d000 + 131418
7 IMAVCore 0x3713d522 0x3711d000 + 132386
8 CoreFoundation 0x372396bc 0x371f8000 + 267964
9 CoreTelephony 0x37c68f3e 0x37c42000 + 159550
10 CoreTelephony 0x37c5929c 0x37c42000 + 94876
11 CoreFoundation 0x3727b0c4 0x371f8000 + 536772
12 libdispatch.dylib 0x33ac2d4e 0x33ac2000 + 3406
13 libdispatch.dylib 0x33ac4f74 0x33ac2000 + 12148
14 CoreFoundation 0x372842d6 0x371f8000 + 574166
15 CoreFoundation 0x372074d6 0x371f8000 + 62678
16 CoreFoundation 0x3720739e 0x371f8000 + 62366
17 GraphicsServices 0x313bdfc6 0x313ba000 + 16326
18 UIKit 0x3287973c 0x32848000 + 202556
19 MyApp 0x00003eae main (main.m:16)
20 MyApp 0x00003e6c start + 32
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x309383b4 0x30937000 + 5044
1 libdispatch.dylib 0x33ac5f74 0x33ac2000 + 16244
2 libdispatch.dylib 0x33ac5c92 0x33ac2000 + 15506
Thread 2 name: WebThread
Thread 2:
0 libsystem_kernel.dylib 0x30938010 0x30937000 + 4112
1 libsystem_kernel.dylib 0x30938206 0x30937000 + 4614
2 CoreFoundation 0x3728541c 0x371f8000 + 578588
3 CoreFoundation 0x37284154 0x371f8000 + 573780
4 CoreFoundation 0x372074d6 0x371f8000 + 62678
5 CoreFoundation 0x3720739e 0x371f8000 + 62366
6 WebCore 0x3305e128 0x32fb6000 + 688424
7 libsystem_c.dylib 0x31f24c16 0x31f15000 + 64534
8 libsystem_c.dylib 0x31f24ad0 0x31f15000 + 64208
Thread 3:
0 libsystem_kernel.dylib 0x30948cd4 0x30937000 + 72916
1 libsystem_c.dylib 0x31f1f30a 0x31f15000 + 41738
2 libsystem_c.dylib 0x31f1f09c 0x31f15000 + 41116
Thread 4:
0 libsystem_kernel.dylib 0x30938010 0x30937000 + 4112
1 libsystem_kernel.dylib 0x30938206 0x30937000 + 4614
2 CoreFoundation 0x3728541c 0x371f8000 + 578588
3 CoreFoundation 0x37284154 0x371f8000 + 573780
4 CoreFoundation 0x372074d6 0x371f8000 + 62678
5 CoreFoundation 0x3720739e 0x371f8000 + 62366
6 Foundation 0x31c8ab7e 0x31c86000 + 19326
7 MyApp 0x00057e7c +[XMPPStream xmppThreadMain] (XMPPStream.m:4089)
8 Foundation 0x31c96a8a 0x31c86000 + 68234
9 Foundation 0x31d2a59a 0x31c86000 + 673178
10 libsystem_c.dylib 0x31f24c16 0x31f15000 + 64534
11 libsystem_c.dylib 0x31f24ad0 0x31f15000 + 64208
Thread 5 name: AURemoteIO::IOThread
Thread 5:
0 libsystem_kernel.dylib 0x30938010 0x30937000 + 4112
1 libsystem_kernel.dylib 0x30938206 0x30937000 + 4614
2 AudioToolbox 0x373e048a 0x37321000 + 783498
3 AudioToolbox 0x373e40ae 0x37321000 + 798894
4 AudioToolbox 0x37322aac 0x37321000 + 6828
5 libsystem_c.dylib 0x31f24c16 0x31f15000 + 64534
6 libsystem_c.dylib 0x31f24ad0 0x31f15000 + 64208
Thread 6 name: com.apple.NSURLConnectionLoader
Thread 6:
0 libsystem_kernel.dylib 0x30938010 0x30937000 + 4112
1 libsystem_kernel.dylib 0x30938206 0x30937000 + 4614
2 CoreFoundation 0x3728541c 0x371f8000 + 578588
3 CoreFoundation 0x37284154 0x371f8000 + 573780
4 CoreFoundation 0x372074d6 0x371f8000 + 62678
5 CoreFoundation 0x3720739e 0x371f8000 + 62366
6 Foundation 0x31c96bc2 0x31c86000 + 68546
7 Foundation 0x31c96a8a 0x31c86000 + 68234
8 Foundation 0x31d2a59a 0x31c86000 + 673178
9 libsystem_c.dylib 0x31f24c16 0x31f15000 + 64534
10 libsystem_c.dylib 0x31f24ad0 0x31f15000 + 64208
Thread 7:
0 libsystem_kernel.dylib 0x30938010 0x30937000 + 4112
1 libsystem_kernel.dylib 0x30938206 0x30937000 + 4614
2 CoreFoundation 0x3728541c 0x371f8000 + 578588
3 CoreFoundation 0x37284154 0x371f8000 + 573780
4 CoreFoundation 0x372074d6 0x371f8000 + 62678
5 CoreFoundation 0x3720739e 0x371f8000 + 62366
6 Foundation 0x31c8ab7e 0x31c86000 + 19326
7 Foundation 0x31ca452c 0x31c86000 + 124204
8 MyApp 0x00070b28 +[GCDAsyncSocket listenerThread] (GCDAsyncSocket.m:6283)
9 Foundation 0x31c96a8a 0x31c86000 + 68234
10 Foundation 0x31d2a59a 0x31c86000 + 673178
11 libsystem_c.dylib 0x31f24c16 0x31f15000 + 64534
12 libsystem_c.dylib 0x31f24ad0 0x31f15000 + 64208
Thread 8 name: com.apple.CFSocket.private
Thread 8:
0 libsystem_kernel.dylib 0x30948570 0x30937000 + 71024
1 CoreFoundation 0x3728966a 0x371f8000 + 595562
2 libsystem_c.dylib 0x31f24c16 0x31f15000 + 64534
3 libsystem_c.dylib 0x31f24ad0 0x31f15000 + 64208
Thread 9 name: Dispatch queue: cocoa.lumberjack
Thread 9:
0 libsystem_kernel.dylib 0x30938060 0x30937000 + 4192
1 libdispatch.dylib 0x33ac6472 0x33ac2000 + 17522
2 libdispatch.dylib 0x33ac63d2 0x33ac2000 + 17362
3 MyApp 0x0007a3e2 +[DDLog lt_log:] (DDLog.m:922)
4 MyApp 0x00079158 __40+[DDLog queueLogMessage:asynchronously:]_block_invoke_0 (DDLog.m:449)
5 libdispatch.dylib 0x33ac2d4e 0x33ac2000 + 3406
6 libdispatch.dylib 0x33ac4dc0 0x33ac2000 + 11712
7 libdispatch.dylib 0x33ac4c56 0x33ac2000 + 11350
8 libdispatch.dylib 0x33ac5860 0x33ac2000 + 14432
9 libsystem_c.dylib 0x31f1f1c8 0x31f15000 + 41416
10 libsystem_c.dylib 0x31f1f09c 0x31f15000 + 41116
Thread 10:
0 libsystem_kernel.dylib 0x30948cd4 0x30937000 + 72916
1 libsystem_c.dylib 0x31f1f30a 0x31f15000 + 41738
2 libsystem_c.dylib 0x31f1f09c 0x31f15000 + 41116
Thread 11:
0 libsystem_kernel.dylib 0x30948cd4 0x30937000 + 72916
1 libsystem_c.dylib 0x31f1f30a 0x31f15000 + 41738
2 libsystem_c.dylib 0x31f1f09c 0x31f15000 + 41116
Thread 12 name: Dispatch queue: cocoa.lumberjack.fileLogger
Thread 12:
0 CoreFoundation 0x3723875a 0x371f8000 + 264026
1 Foundation 0x31cb0722 0x31c86000 + 173858
2 Foundation 0x31cb069a 0x31c86000 + 173722
3 MyApp 0x001d8510 -[MyCustomFormatter formatLogMessage:] (MyAppDelegate.m:101)
4 MyApp 0x0007782c -[DDFileLogger logMessage:] (DDFileLogger.m:986)
5 MyApp 0x0007a79e __16+[DDLog lt_log:]_block_invoke_0 (DDLog.m:916)
6 libdispatch.dylib 0x33ac2d4e 0x33ac2000 + 3406
7 libdispatch.dylib 0x33ac4dc0 0x33ac2000 + 11712
8 libdispatch.dylib 0x33ac4c56 0x33ac2000 + 11350
9 libdispatch.dylib 0x33ac5860 0x33ac2000 + 14432
10 libsystem_c.dylib 0x31f1f1c8 0x31f15000 + 41416
11 libsystem_c.dylib 0x31f1f09c 0x31f15000 + 41116
Thread 13:
0 libsystem_kernel.dylib 0x30948cd4 0x30937000 + 72916
1 libsystem_c.dylib 0x31f1f30a 0x31f15000 + 41738
2 libsystem_c.dylib 0x31f1f09c 0x31f15000 + 41116
Thread 14:
0 libsystem_kernel.dylib 0x30948cd4 0x30937000 + 72916
1 libsystem_c.dylib 0x31f1f30a 0x31f15000 + 41738
2 libsystem_c.dylib 0x31f1f09c 0x31f15000 + 41116
Thread 0 crashed with ARM Thread State:
r0: 0x00000000 r1: 0x03000003 r2: 0x000000bc r3: 0x00000068
r4: 0x00000107 r5: 0x00000000 r6: 0x00000000 r7: 0x2fdfe3c8
r8: 0x00000000 r9: 0x00a80df8 r10: 0x03000003 r11: 0x00000000
ip: 0xffffffe1 sp: 0x2fdfe38c lr: 0x3093820d pc: 0x30938010
cpsr: 0x200f0010
另一个类似，并在Thread 12
-[MyCustomFormatter formatLogMessage:] (MyAppDelegate.m:101)崩溃
以下是- (NSString *)formatLogMessage:(DDLogMessage *)logMessage的代码：
NSString *logLevel;
switch (logMessage->logFlag) {
case LOG_FLAG_ERROR : logLevel = @"[E]"; break;
case LOG_FLAG_WARN : logLevel = @"[W]"; break;
case LOG_FLAG_INFO : logLevel = @"[I]"; break;
default : logLevel = @"[V]"; break;
}
/*line 100*/
/*line 101*/ NSString *dateAndTime = [dateFormatter stringFromDate:(logMessage->timestamp)];
/*line 102*/
NSString *logMsg = logMessage->logMsg;
NSString *fileName = [NSString stringWithCString:logMessage->file encoding:[NSString defaultCStringEncoding]];
NSString *function = [NSString stringWithCString:logMessage->function encoding:[NSString defaultCStringEncoding]];
return [NSString stringWithFormat:@"%@ - %@ (%@ - %@) | %@\n", logLevel, dateAndTime, fileName, function, logMsg];
dateFormatter初始化MyCustomFormatter init：
- (id)init
{
if((self = [super init]))
{
self.dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[dateFormatter setDateFormat:@"yyyy/MM/dd HH:mm:ss:SSS"];
}
return self;
}
其界面如下：
@interface MyCustomFormatter : NSObject <DDLogFormatter>
{
NSDateFormatter *dateFormatter;
}
@property (nonatomic, retain) NSDateFormatter *dateFormatter;
@end
App Delegate - (void)applicationWillResignActive:(UIApplication *)application中的代码如下所示：
self.bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
DDLogInfo(@"Ending bg task in expiration handler");
//TODO: remove after tests
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:66];
[[XMPP instance] disconnect];
[app endBackgroundTask:self.bgTask];
self.bgTask = UIBackgroundTaskInvalid;
}];
// Start the long-running task and return immediately.
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// Do the work associated with the task.
sleep(600);
if(self.bgTask != UIBackgroundTaskInvalid){
//TODO: remove after tests
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:99];
DDLogInfo(@"Disconnecting from XMPP in bg task after waited in bg");
[[XMPP instance] disconnect];
[app endBackgroundTask:self.bgTask];
self.bgTask = UIBackgroundTaskInvalid;
}
});
- (void)applicationWillEnterForeground:(UIApplication *)application：
DDLogVerbose(@"ApplicationWillEnterForeground:");
if(self.bgTask != UIBackgroundTaskInvalid){
[[UIApplication sharedApplication] endBackgroundTask:self.bgTask];
self.bgTask = UIBackgroundTaskInvalid;
}
else {
[[XMPP instance] connect];
}
我已经设置了徽章，以便知道该应用是否仍在运行，以及它是如何停止的，并注意到该应用在仅从徽章66打开背景时崩溃。< / p>
任何帮助都将不胜感激。
提前致谢。