Objective C Boolean Array

Question

Yep, that’s exactly what it is: the NS* containers can only store objective-C objects, not primitive types.

You should be able to accomplish what you want by wrapping it up in an NSNumber:

[updated_users replaceObjectAtIndex:index withObject:[NSNumber numberWithBool:YES]]

or by using @(YES) which wraps a BOOL in an NSNumber

[updated_users replaceObjectAtIndex:index withObject:@(YES)]]

You can then pull out the boolValue:

BOOL mine = [[updated_users objectAtIndex:index] boolValue];