我们如何在iOS应用程序中存储崩溃日志

我们可以将正常的日志存储到文件中，但是当应用程序崩溃时，如何在文件中存储崩溃的原因。所以我们可以知道原因。 我们如何在iOS应用程序中存储崩溃日志。

Answer 1

在main.m文件中

int main(int argc, char *argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; // int retVal = UIApplicationMain(argc, argv, nil, nil); // [pool release]; // return retVal; int retVal; @try { retVal = UIApplicationMain(argc, argv, nil, NSStringFromClass([SRSPoulinsAppAppDelegate class])); } @catch (NSException *exception) { NSLog(@"CRASH: %@", exception); // NSLog(@"Stack Trace: %@", [exception callStackSymbols]); NSString *BugFileName = @"BugTracker.txt"; // Check if the SQL database has already been saved to the users phone, if not then copy it over BOOL success; NSFileManager *fileManager = [NSFileManager defaultManager]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:BugFileName]; // Check if the database has already been created in the users filesystem success = [fileManager fileExistsAtPath:writableDBPath]; // If the database already exists then return without doing anything if(success) { NSString *error = [NSString stringWithFormat:@"%@",exception ]; NSString *errorDesc = [error stringByAppendingString:[NSString stringWithFormat:@"\n%@",[exception callStackSymbols]]]; NSFileHandle *fileHandler = [NSFileHandle fileHandleForUpdatingAtPath:writableDBPath]; [fileHandler seekToEndOfFile]; [fileHandler writeData:[errorDesc dataUsingEncoding:NSUTF8StringEncoding]]; [fileHandler closeFile]; } else { writableDBPath = [documentsDirectory stringByAppendingPathComponent:BugFileName]; //create file if it doesn't exist if(![[NSFileManager defaultManager] fileExistsAtPath:writableDBPath]) { [[NSFileManager defaultManager] createFileAtPath:writableDBPath contents:nil attributes:nil]; } //append text to file (you'll probably want to add a newline every write) NSString *error = [NSString stringWithFormat:@"%@",exception ]; NSString *errorDesc = [error stringByAppendingString:[NSString stringWithFormat:@"\n%@",[exception callStackSymbols]]]; NSFileHandle *file = [NSFileHandle fileHandleForUpdatingAtPath:writableDBPath]; [file seekToEndOfFile]; [file writeData:[errorDesc dataUsingEncoding:NSUTF8StringEncoding]]; [file closeFile]; } // [request setDidFinishSelector:@selector(requestFinished:)]; //[request setDidFailSelector:@selector(requestFailed:)]; } @finally { } return retVal; }