Terminating App - NSInvalidArgumentException - ios

Question

Crashing when running Parse Anypic code.
-(void)sendCommentButton:(id) sender {
NSString *trimmedComment = [commentTextView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
if (trimmedComment.length != 0 && [self.photo objectForKey:kPAPPhotoUserKey]) {
PFObject *comment = [PFObject objectWithClassName:kPAPActivityClassKey];
[comment setObject:trimmedComment forKey:kPAPActivityContentKey]; // Set comment text
[comment setObject:[self.photo objectForKey:kPAPPhotoUserKey] forKey:kPAPActivityToUserKey]; // Set toUser
[comment setObject:[PFUser currentUser] forKey:kPAPActivityFromUserKey]; // Set fromUser
[comment setObject:kPAPActivityTypeComment forKey:kPAPActivityTypeKey];
[comment setObject:self.photo forKey:kPAPActivityPhotoKey];
[comment setObject:self.photoFile forKey:#"attachmentFile"];
PFACL *ACL = [PFACL ACLWithUser:[PFUser currentUser]];
[ACL setPublicReadAccess:YES];
[ACL setWriteAccess:YES forUser:[self.photo objectForKey:kPAPPhotoUserKey]];
comment.ACL = ACL;
[[PAPCache sharedCache] incrementCommentCountForPhoto:self.photo];
// Show HUD view
[MBProgressHUD showHUDAddedTo:self.view.superview animated:YES];
// If more than 5 seconds pass since we post a comment, stop waiting for the server to respond
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self selector:#selector(handleCommentTimeout:) userInfo:#{#"comment": comment} repeats:NO];
[comment saveEventually:^(BOOL succeeded, NSError *error) {
[timer invalidate];
if (error && error.code == kPFErrorObjectNotFound) {
[[PAPCache sharedCache] decrementCommentCountForPhoto:self.photo];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(#"Could not post comment", nil) message:NSLocalizedString(#"This photo is no longer available", nil) delegate:nil cancelButtonTitle:nil otherButtonTitles:#"OK", nil];
[alert show];
[self.navigationController popViewControllerAnimated:YES];
}
[[NSNotificationCenter defaultCenter] postNotificationName:PAPPhotoDetailsViewControllerUserCommentedOnPhotoNotification object:self.photo userInfo:#{#"comments": #(self.objects.count + 1)}];
[MBProgressHUD hideHUDForView:self.view.superview animated:YES];
[self loadObjects];
}];
}
[self.commentTextView setText:#""];
[self.commentTextView resignFirstResponder];
if (self.photoFile != nil) {
self.photoFile = nil;
}
}
Picking an Image
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSLog(#"Hello");
UIImage *img = [info objectForKey:UIImagePickerControllerOriginalImage];
// JPEG to decrease file size and enable faster uploads & downloads
NSData *imageData = UIImageJPEGRepresentation(img, 0.8f);
self.photoFile = [PFFile fileWithData:imageData];
// Request a background execution task to allow us to finish uploading the photo even if the app is backgrounded
self.fileUploadBackgroundTaskId = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
[[UIApplication sharedApplication] endBackgroundTask:self.fileUploadBackgroundTaskId];
}];
NSLog(#"Requested background expiration task with id %lu for Anypic photo upload", (unsigned long)self.fileUploadBackgroundTaskId);
[self.photoFile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (succeeded) {
NSLog(#"Photo uploaded successfully");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Photo Uploaded"
message:#"successfully"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
} else {
[[UIApplication sharedApplication] endBackgroundTask:self.fileUploadBackgroundTaskId];
}
}];
[self dismissViewControllerAnimated:YES completion:nil];
}
Question: Why is it crashing? I believe this is the code that is crashing it. What I did to crash it was not add an attachmentFile and just put a comment.
If you need more code or need any clarifications please comment down below

Answer 1

PFObject *comment = [PFObject objectWithClassName:kPAPActivityClassKey];
[comment setObject:trimmedComment forKey:kPAPActivityContentKey]; // Set comment text
[comment setObject:[self.photo objectForKey:kPAPPhotoUserKey] forKey:kPAPActivityToUserKey]; // Set toUser
[comment setObject:[PFUser currentUser] forKey:kPAPActivityFromUserKey]; // Set fromUser
[comment setObject:kPAPActivityTypeComment forKey:kPAPActivityTypeKey];
[comment setObject:self.photo forKey:kPAPActivityPhotoKey];
[comment setObject:self.photoFile forKey:#"attachmentFile"];
In one of these lines, you're passing nil to the first parameter of setObject:forKey. Add an Exception Breakpoint (in the breakpoints tab of left sidebar) and check which line it breaks on.