Question

I keep getting this error when i try to bind a nsobject to a segment control

UserLocation isEqualToString:]: unrecognized selector sent to instance 0x7477a60
2013-01-22 12:44:58.115 Momentum[39936:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UserLocation isEqualToString:]: unrecognized selector sent to instance 0x7477a60'

I have verified that my core data object has data.

NSarray *arrayuserlocation = [[MMIStore defaultStore] loadAllUserLocation];
UISegmentedControl *segControl = [[UISegmentedControl alloc]initWithItems:arrayuserlocation];
[segControl addTarget:self action:@selector(didChangeSegmentControl:)      forControlEvents:UIControlEventValueChanged];
[segControl setSegmentedControlStyle:UISegmentedControlStyleBar];
[segControl setTintColor:[UIColor grayColor]];

EDIT

To the answer the question below

- (NSMutableArray *)loadAllUserLocation
{
    if (!allItems) {NSFetchRequest *request = [[NSFetchRequest alloc] init];

    NSEntityDescription *e = [[model entitiesByName] objectForKey:@"UserLocation"];
            [request setEntity:e]
    NSError *error;
        NSArray *result = [context executeFetchRequest:request error:&error];
        if (!result) {
            [NSException raise:@"Fetch failed"
                        format:@"Reason: %@", [error localizedDescription]];
        }

        allItems = [[NSMutableArray alloc] initWithArray:result];
}
 return allItems;

It returns an array

I was able to solve my problem by doing the following.

 NSArray *arraylocation = [[MMIStore defaultStore] loadAllUserLocation];
    NSMutableArray *newarray = [[NSMutableArray alloc] init];
    for (UserLocation *user in arraylocation)
    {

        NSLog(@"%@ found", user.locationNm);
        [newarray addObject:user.locationNm];

    }

And using newarray as the datasource for the segment control.

Answer 1

As I mentioned in comments, the issue is that you are passing userlocation objects instead of NSString or UIImage objects required.

As per the documentation your items array should be “an array of NSString objects (for segment titles) or UIImage objects (for segment images).”

You need to fetch the strings from user location as,

NSarray *arrayuserlocation = [[[MMIStore defaultStore] loadAllUserLocation] valueForKey:@"locationNm"];//use the param name here

This should give you an array of all strings from the array of objects.