获取已发布的app错误信息：

获取已发布的app错误信息：

第一种方法：

在uiapplication.m添加

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions｛

NSSetUncaughtExceptionHandler(&myExceptionHandler);

｝

添加以上代码

//处理异常＝＝＝＝＝＝＝＝＝＝＝

void myExceptionHandler(NSException *exception)

{

    NSArray *stack = [exception callStackReturnAddresses];

    NSLog(@"Stack trace: %@", stack);

    

    NSArray *arr = [exception callStackSymbols];

    NSString *reason = [exception reason];

    NSString *name = [exception name];

    

    

    //调用发邮件处理错误

/*    NSString *urlStr = [NSString stringWithFormat:@"mailto://[email protected]?subject=bug报告&body=感谢您的配合!<br><br><br>" "错误详情：<br>%@<br>---------<br>%@<br>------<br>%@",name,reason,[arr componentsJoinedByString:@"<br>"]];

    

    NSURL *url = [NSURL URLWithString:[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    

    [[UIApplication sharedApplication] openURL:url];  */

    

    

    //保存在txt文档中,然后在发邮件出去,文档要加密，才能添加附件成功。

    NSString *txtUrl = [NSString stringWithFormat:@"========异常崩溃报=====\nname:\n%@\nreason: \n%@\ncallStackSymbols:\n%@",name,reason,[arr componentsJoinedByString:@"\n"]];

    

    NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Exception.txt"];

    

    [txtUrl writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];

    

    NSString *urlStr = [NSString stringWithFormat:@"mailto://[email protected]?subject=bug报告&attachment＝%@&body=感谢您的配合!<br><br><br>" "错误详情：<br>%@<br>---------<br>%@<br>------<br>%@",path,name,reason,[arr componentsJoinedByString:@"<br>"]];

    

     NSURL *url = [NSURL URLWithString:[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    [[UIApplication sharedApplication] openURL:url];

}

第二种方法：

如果不是在模拟器上，又或者我们的设备没有连接到PC上，那么如何调试我们的程序呢？假如我们通过AdHoc发布了程序，希望随时得到测试人员的反馈，可以利用下面的方法，将标准出力（stderr）信息记录到文件中，然后通过邮件新式发给开发者。

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;

}

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);
}

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];

}