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在app发布到商店之后,用户的crash报告怎么才能收集回来? 根据苹果官方的文档,当设备连接上itunes后,crash报告会自动同步至pc,但是用户可能很少这么做,即使有,可能用户也找不到,用户找到了,也可能不想麻烦再传给你。这时候,我们改怎么办?
其实,我们可以自己做一个错误收集模块。不过这个收集要分成两个部分:1、NSException 2、非NSException致命错误(如提前释放内存、内存超最高限制)
第一部分,NSException的收集。采用自定义exception处理函数,替换系统处理函数来取得exception发生时的具体错误信息、堆栈状态。
自定义exception处理函数:
- void exceptionHandler(NSException *exception) {
- NSLog(@"Exception throw: %@", exception);
- NSLog(@"Stack Trace:\r\n%@", [exception callStackSymbols]);
-
- }
void exceptionHandler(NSException *exception) { NSLog(@"Exception throw: %@", exception); NSLog(@"Stack Trace:\r\n%@", [exception callStackSymbols]); //NSLog(@"Stack Trace:\r\n%@", GTMStackTraceFromException(exception));}
然后调用
- NSSetUncaughtExceptionHandler(&exceptionHandler);
NSSetUncaughtExceptionHandler(&exceptionHandler);
来替换系统得exception处理函数.
第二部分:signal的处理
自定义系统收到signal时得处理函数:
- void stacktrace(int sig, siginfo_t *info, void *context)
- {
-
- NSMutableString * mstr = [[NSMutableString alloc] initWithCapacity:0];
- [mstr appendString:@"Stack:\n"];
-
- 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]];
- }
-
- NSLog(@"Stack Trace:\r\n%@", mstr);
- }
void stacktrace(int sig, siginfo_t *info, void *context){ NSMutableString * mstr = [[NSMutableString alloc] initWithCapacity:0]; [mstr appendString:@"Stack:\n"]; 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]]; } NSLog(@"Stack Trace:\r\n%@", mstr);}
注册系统要监测的signal:
- 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);
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);
另外,还有一种办法就是将console中得错误重定向,写入文本。
1. 设置一个开关,用来清空日志文件内容,并切换输出位置;
- - (BOOL)deleteLogFile {
-
- [self finishLog];
- BOOL success = [[NSFileManager defaultManager] removeItemAtPath:[self loggingPath] error:nil];
- [self startLog];
- return success;
-
- }
- (BOOL)deleteLogFile { [self finishLog]; BOOL success = [[NSFileManager defaultManager] removeItemAtPath:[self loggingPath] error:nil]; [self startLog]; return success;}
当我们调用上面的deleteLogFile后,就会清空之前的日志,并设置新的输出。
- - (void)finishLog {
-
- fflush(stderr);
- dup2(dup(STDERR_FILENO), STDERR_FILENO);
- close(dup(STDERR_FILENO));
-
- }
-
- - (NSString*)loggingPath {
-
- NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
- NSString *documentsDirectory = [paths objectAtIndex:0];
- NSString *logPath = [documentsDirectory stringByAppendingPathComponent:@"console.log"];
- return logPath;
-
- }
-
- - (void)startLog {
- freopen([[self loggingPath] cStringUsingEncoding:NSASCIIStringEncoding],"a+",stderr);
- }
- (void)finishLog { fflush(stderr); dup2(dup(STDERR_FILENO), STDERR_FILENO); close(dup(STDERR_FILENO));}- (NSString*)loggingPath { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *logPath = [documentsDirectory stringByAppendingPathComponent:@"console.log"]; return logPath;}- (void)startLog { freopen([[self loggingPath] cStringUsingEncoding:NSASCIIStringEncoding],"a+",stderr);}
2. 当日志取得之后,可以通过下面的方式发送邮件给开发者 - - (void)sendLogByMail {
-
- MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
- picker.mailComposeDelegate = self;
- [picker setSubject:[NSString stringWithFormat:@"%@ - Log", [self appName]]];
- NSString *message = [NSString stringWithContentsOfFile:[self loggingPath] encoding:NSUTF8StringEncoding error:nil];
- [picker setMessageBody:message isHTML:NO];
- [self.navigationController presentModalViewController:picker animated:YES];
- [picker release];
-
- }
- (void)sendLogByMail { MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; picker.mailComposeDelegate = self; [picker setSubject:[NSString stringWithFormat:@"%@ - Log", [self appName]]]; NSString *message = [NSString stringWithContentsOfFile:[self loggingPath] encoding:NSUTF8StringEncoding error:nil]; [picker setMessageBody:message isHTML:NO]; [self.navigationController presentModalViewController:picker animated:YES]; [picker release];}
最后总结:
因iOS sdk中没有<Foundation/NSDebug.h>, 不能使用backtrace_symbols等函数,在网上有一个方便得工具库(),其中有专门处理stacktrace的GTMStackTrace.
综合上面的代码如下:
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- #import <UIKit/UIKit.h>
- #include <signal.h>
- #import "config.h"
-
- #import "GTMStackTrace.h"
-
- void exceptionHandler(NSException *exception) {
- NSLog(@"Exception throw: %@", exception);
- NSLog(@"Stack Trace:\r\n%@", [exception callStackSymbols]);
-
- }
-
- void stacktrace(int sig, siginfo_t *info, void *context)
- {
-
-
-
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-
-
-
-
-
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-
-
- NSLog(@"Stack Trace:\r\n%@", GTMStackTrace());
- }
-
- int main(int argc, char *argv[]) {
- NSSetUncaughtExceptionHandler(&exceptionHandler);
-
- 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);
-
- NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
- int retVal = UIApplicationMain(argc, argv, nil, nil);
- [pool release];
- return retVal;
- }
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