IOS [__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]'

ios, nsarray, tableview, uitableview

Solution

It is because

newProject.title= [projectObject objectForKey:@"title"];

is nil, and you are trying to add it to the array. Check to see what that value is by logging it

NSLog(@"%@", [projectObject objectForKey:@"title"]);

Problem

I am trying to create a dynamic slide menu like facebook. I have to get some data from a json request. and display this data in one of the sections of the slide table view. I'm new in objective-c, I also tried with NSMutableArrays and I had an error. In other table views I do the same but without sections. only one MutableArray and I can show the table. I do something like this: ``` -(void) requestJSONFinishedWithParsedObject:(NSDictionary *)parsedObject{ NSArray *projectsObjectArray = [parsedObject objectForKey:@"projects"]; [self createMainNavigationController]; self.section1 = [NSArray arrayWithObjects:@"Profile", @"Notifications", @"Exit", nil]; self.section2 = [NSArray arrayWithObjects:@"Main", nil]; for (NSDictionary *projectObject in projectsObjectArray) { Project *newProject = [[Project alloc] init]; newProject.title= [projectObject objectForKey:@"title"]; self.section3 = [NSArray arrayWithObject:newProject.title]; } self.menu = [NSArray arrayWithObjects:self.section1, self.section2, self.section3, nil]; [menuTableView reloadData]; } ``` I am having this error : ``` *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]' ```

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