Question

Recently we came across a situation where we wanted to see the debug info from the app which a user has on his device. So, what I am looking for is a way to find the log on the device, paste it as inline text on a mail and allow the user to send it..

Any ideas? Here are the questions again..
1)Find a debug log on the device
2)open the file and attach the contents of the file as inline text in to the mail.
3)Allow the user to email it the next time app launches..

Thanks,

Answer 1

Thanks for all the inputs guys.. I clubbed your solutions into one that would solve my problem.. Here is what I made it to be.. Surely I did not compile the code, it is a half baked code.. but I will iron it soon once as I implement it in my code..

NSLog into file How to NSLog into a file LOG2FILE

#if TARGET_IPHONE_SIMULATOR == 0    
    NSArray *paths =  
    NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);        
    NSString *documentsDirectory = [paths objectAtIndex:0];    
    NSString *logPath = [documentsDirectory stringByAppendingPathComponent:@"console.log"];    
    freopen([logPath cStringUsingEncoding:NSASCIIStringEncoding],"a+",stderr);
#endif

Catch the Crash and Log them too into a File

First, create a function that will handle the error and output it to the console (as well as whatever else you want to do with it):

void uncaughtExceptionHandler(NSException *exception) {    
    NSLog(@"CRASH: %@", exception);      
    NSLog(@"Stack Trace: %@", [exception callStackSymbols]);    
    // Internal error reporting
}

Next, add the exception handler to your app delegate:

-(BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:  
(NSDictionary*)launchOptions
{   
    NSSetUncaughtExceptionHandler(&uncaughtExceptionHandler);    // Normal launch stuff
}

Set a variable in the info.plist called Crashed and then read/write it this way

- (void)readPlist
 {
      NSString *localizedPath = [[NSBundle mainBundle] pathForResource:fileName ofType:@"plist"];        
      NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:localizedPath];

    NSString *crashed;
    crashed = [plistDict objectForKey:@"Crashed"];
}


- (void)writeToPlist
{
    NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];

    [plistDict setValue:@"YES" forKey:@"Crashed"];
    [plistDict writeToFile:filePath atomically: YES];
}

Once the app launches read the info.plist and prompt the user to submit the crash logs..

{
    MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init];
    mailComposer.mailComposeDelegate = self;[mailComposer setSubject:@"Crash Log"];
    // Set up recipients
    NSArray *toRecipients = [NSArray arrayWithObject:@"[e-mail]"]; 
    [mailComposer setToRecipients:toRecipients];
    // Attach the Crash Log..
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *logPath = [documentsDirectory stringByAppendingPathComponent:@"console.log"];
    NSData *myData = [NSData dataWithContentsOfFile:logPath];
    [mailComposer addAttachmentData:myData mimeType:@"Text/XML" fileName:@"Console.log"];
    // Fill out the email body text
    NSString *emailBody = @"Crash Log";
    [mailComposer setMessageBody:emailBody isHTML:NO];
    [self presentModalViewController:mailComposer animated:YES];
}