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Asked: 2026-05-11T06:32:13+00:00

I find that randomly I get a EXC_BAD_ACCESS error on the iPhone when updating

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I find that randomly I get a EXC_BAD_ACCESS error on the iPhone when updating the status. This occurs pretty randomly.

Anyone have any idea to how this make be fixed?

#import 'TwitterViewController.h'  NSString *_testUID = nil; NSString *sImageName;  @implementation TwitterViewController  //Turns NSLogs into comments //#define NSLog //  - (void)viewDidLoad {      self.title = @'Twitter';      arrayEmotes = [[NSMutableArray alloc] init];     [arrayEmotes addObject:@'Happy'];     [arrayEmotes addObject:@'Sad'];     [arrayEmotes addObject:@'Tongue'];     [arrayEmotes addObject:@'Drunk'];     [arrayEmotes addObject:@'Bored'];     [arrayEmotes addObject:@'Love'];     [arrayEmotes addObject:@'Sleepy'];     [arrayEmotes addObject:@'Sick'];     [arrayEmotes addObject:@'Awake'];     [arrayEmotes addObject:@'Shocked'];     [arrayEmotes addObject:@'Angry'];     [arrayEmotes addObject:@'Laughing'];     [arrayEmotes addObject:@'Dancing'];     [arrayEmotes addObject:@'Confused'];      [activityView startAnimating];     [currentActivity setText:@'Logging In'];      NSString *username = [[NSUserDefaults standardUserDefaults] stringForKey:@'username_preference'];     NSString *password = [[NSUserDefaults standardUserDefaults] stringForKey:@'password_preference'];      // Make sure you entered your login details before running this code... ;)     if ([username isEqualToString:@''] || [password isEqualToString:@'']) {         //Show the UIAlert if no username or password is stored in the settings         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@'Error' message:@'Incorrect username/password stored in the settings.' delegate:self cancelButtonTitle:@'OK' otherButtonTitles:nil];         [alert show];         [alert release];                 NSLog(@'You forgot to specify your username/password in settings.bundle!');     }      // Create a TwitterEngine and set our login details.     twitterEngine = [[[MGTwitterEngine alloc] initWithDelegate:self] retain];     [twitterEngine setUsername:username password:password];      // Get updates from people the authenticated user follows.     //[twitterEngine getFollowedTimelineFor:username since:nil startingAtPage:0];     _testUID = [twitterEngine testService]; }  - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView {     return 1; }   - (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component {     return [arrayEmotes count]; }  - (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {     return [arrayEmotes objectAtIndex:row]; }  - (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {     NSLog(@'Selected Color: %@. Index of selected color: %i', [arrayEmotes objectAtIndex:row], row);     [btnUpdateMood setEnabled:YES]; }  - (IBAction)updateMood:(id)sender {         NSLog(@'Tried to send status.');      NSInteger selectedindex = [pickerView selectedRowInComponent:0];     switch(selectedindex){         case 0:             //Happy             sImageName = @'Happy';             break;         case 1:             //Sad             sImageName = @'Sad';             break;         case 2:             //Tongue             sImageName = @'Tounge';             break;         case 3:             //Drunk             sImageName = @'Drunk';             break;         case 4:             //Bored             sImageName = @'Bored';             break;         case 5:             //Love             sImageName = @'Love';             break;         case 6:             //Sleepy             sImageName = @'Sleepy';             break;         case 7:             //Sick             sImageName = @'Sick';             break;         case 8:             //Awake             sImageName = @'Awake';             break;         case 9:             //Shocked             sImageName = @'Shocked';             break;         case 10:             //Angry             sImageName = @'Angry';                       break;         case 11:             //Laughing             sImageName = @'Laughing';                        break;         case 12:             //Dancing             sImageName = @'Dancing';             break;         case 13:             //Confused             sImageName = @'Confused';             break;         default: break;     }         [twitterEngine sendUpdate:[@'has changed his/her iMood to ' stringByAppendingString:sImageName]];  }   // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {     return (interfaceOrientation == UIInterfaceOrientationPortrait); }   - (void)dealloc {     //Releasing seems to sometimes cause complete errors.     //[twitterEngine release];     [super dealloc]; }  #pragma mark MGTwitterEngineDelegate methods   - (void)requestSucceeded:(NSString *)requestIdentifier {     [activityView stopAnimating];      //Some animations     [UIView beginAnimations:@'redToWhite' context:nil];     [UIView setAnimationBeginsFromCurrentState:YES];     [UIView setAnimationDuration:1];     [UIView setAnimationRepeatCount:0];      //Change background colour of the activity area over 1 second     [activityArea setBackgroundColor:[UIColor whiteColor]];     [currentActivity setText:@'Logged In'];      [UIView commitAnimations];     //End of animations      NSLog(@'Request succeeded (%@)', requestIdentifier);      if ([requestIdentifier isEqualToString:_testUID])     {         NSLog(@'[TWITTER UP]');     }  }   - (void)requestFailed:(NSString *)requestIdentifier withError:(NSError *)error {      currentActivity.text = [NSString stringWithFormat:@'Error: %@ %@', [error localizedDescription], [[error userInfo] objectForKey:NSErrorFailingURLStringKey]];     NSLog(@'Twitter request failed! (%@) Error: %@ (%@)',            requestIdentifier,            [error localizedDescription],            [[error userInfo] objectForKey:NSErrorFailingURLStringKey]);  }   - (void)statusesReceived:(NSArray *)statuses forRequest:(NSString *)identifier {     NSLog(@'Got statuses:\r%@', statuses); }   - (void)directMessagesReceived:(NSArray *)messages forRequest:(NSString *)identifier {      NSLog(@'Got direct messages:\r%@', messages); }   - (void)userInfoReceived:(NSArray *)userInfo forRequest:(NSString *)identifier {     NSLog(@'Got user info:\r%@', userInfo); }   - (void)miscInfoReceived:(NSArray *)miscInfo forRequest:(NSString *)identifier {     NSLog(@'Got misc info:\r%@', miscInfo); }   - (void)imageReceived:(UIImage *)image forRequest:(NSString *)identifier {     NSLog(@'Got an image: %@', image); }     @end
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1 Answer

  1. You have a few leaks (twitterEngine (you are retaining it when alloc/init does the job fine) and arrayEmotes (never gets released) to name the two I spotted right away), and you could have another issue related to sImageName when you send the update (notice how it isn’t defined on a scope other than inside the switch statement – I don’t really know if this would definitely cause issues, it’s just something I always try to avoid. I can see it potentially causing an EXC_BAD_ACCESS).

    Anyway, try using GDB to step through your program to figure out what object exactly is being released early. A lot of headaches can be solved simply with GDB.

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