iOS异常捕获和处理

2013年4月份整理的代码，仅作记录：

 

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//先宏定义

//发布和未发布状态的日志切换

#ifdef DEBUG

    //异常栈开关

    #define STACK_KEY YES

    //日志重定向开关

    #define STDERR_KEY NO

    //调试日志

    #define DebugLog(format,...)    NSLog(@"{%s,%d}" format, __FUNCTION__,__LINE__,##__VA_ARGS__)

    //异常栈日志

    #define StackLog(format,...)    NSLog(@"{%s,%d}" format, __FUNCTION__,__LINE__,##__VA_ARGS__)

    //输出日至

    #define DLOG(...)   NSLog(__VA_ARGS__)

    //输出详细日志

    #define DLOGEXT(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

    //输出调用

    #define DLOGCALL DLOG(@"[%@ %@]", NSStringFromClass([self class]), NSStringFromSelector(_cmd))

    //输出方法

    #define DLOGMETHODNSLog(@"[%s] %@", class_getName([self class]), NSStringFromSelector(_cmd));

    //输出点

    #define DLOGPOINT(p)NSLog(@"%f,%f", p.x, p.y);

    //输出大小

    #define DLOGSIZE(p)NSLog(@"%f,%f", p.width, p.height);

    //输出矩形

    #define DLOGRECT(p)NSLog(@"%f,%f %f,%f", p.origin.x, p.origin.y, p.size.width, p.size.height);

#else

    #define STACK_KEY YES

    #define STDERR_KEY YES

    #define DebugLog(format,...)

    #define StackLog(format,...)

    #define DLOG(...)

    #define DLOGEXT(...)

    #define DLOGCALL

    #define DLOGMETHOD

    #define DLOGPOINT(p)

    #define DLOGSIZE(p)

    #define DLOGRECT(p)

#endif

 

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AppDelegate的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions中加入以下代码：

 

 

 

    //设置异常日志文件

    if (STDERR_KEY) {

         NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

        NSString *documentDir = [paths objectAtIndex:0];

        NSString *decyStr = [NSString stringWithFormat:@"decrypt.log"];

        NSString *logPath = [documentDir stringByAppendingPathComponent:decyStr];

        freopen([logPath cStringUsingEncoding:NSASCIIStringEncoding], "w+", stderr);

    }

   

    //异常栈

    if (STACK_KEY) {

        //设置处理异常的Handler

        NSSetUncaughtExceptionHandler(&UncaughtExceptionHandler);

       

        //signal处理机制

        struct sigaction mySigAction;

        mySigAction.sa_sigaction = stacktrace;

        mySigAction.sa_flags = SA_SIGINFO;

       

        sigemptyset(&mySigAction.sa_mask);

        sigaction(SIGQUIT, &mySigAction, NULL);

        sigaction(SIGILL , &mySigAction, NULL);

        sigaction(SIGTRAP, &mySigAction, NULL);

        sigaction(SIGABRT, &mySigAction, NULL);

        sigaction(SIGEMT , &mySigAction, NULL);

        sigaction(SIGFPE , &mySigAction, NULL);

        sigaction(SIGBUS , &mySigAction, NULL);

        sigaction(SIGSEGV, &mySigAction, NULL);

        sigaction(SIGSYS , &mySigAction, NULL);

        sigaction(SIGPIPE, &mySigAction, NULL);

        sigaction(SIGALRM, &mySigAction, NULL);

        sigaction(SIGXCPU, &mySigAction, NULL);

        sigaction(SIGXFSZ, &mySigAction, NULL);

    }

 

 

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并在同个页面中实现以下方法:

 

//异常处理

#pragma mark - DebugMethods

void UncaughtExceptionHandler(NSException *exception) {

    StackLog(@"receive a UncaughtExceptionHandler");

    NSArray *arr = [exception callStackSymbols];

    NSString *reason = [exception reason];

    NSString *name = [exception name];

    NSString *syserror = [NSStringstringWithFormat:@"UncaughtExceptionHandlerName:%@\nUncaughtExceptionHandlerReason:%@\nUncaughtExceptionHandlerArray：%@",name, reason, arr];

    StackLog(@"%@", syserror);

}

void stacktrace(int sig, siginfo_t *info, void *context)

{

    

    NSMutableString * mstr = [[[NSMutableStringalloc] initWithCapacity:0] autorelease];

    [mstr appendString:@"Stack:\n"];

    StackLog(@"sig %d",sig);

    

    void* callstack[128];

    int i, frameCount = backtrace(callstack, 128);

    char** strs = backtrace_symbols(callstack, frameCount);

    for (i = 0; i < frameCount; ++i) {

        [mstr appendFormat:@"%s\n", strs[i]];

    }

    

    StackLog(@"Stack Trace:\r\n%@", mstr);

}

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