how to add nil to nsmutablearray?

Question

NSArray *array = [[NSArray alloc] initWithObjects:@\"ΕΛΤΑ\",
                      @\"ΕΛΤΑ COURIER\", @\"ACS\", @\"ACS ΕΞΩΤΕΡΙΚΟ\", 
                      @\"DHL\",          


        

Answer 1

If you really want a Null-ish item in your collection, NSNull is there for that.

Answer 2

You can't add an object to an NSArray because that class is immutable. You have to use NSMutableArray if you want to change the array after it is created.

Answer 3

If you must add a nil object to a collection, use the NSNull class:

The NSNull class defines a singleton object used to represent null values in collection objects (which don’t allow nil values).

Assuming "array" is of type NSMutableArray:

....
[array addObject:[NSNumber numberWithInt:2];
[array addObject:@"string"];
[array addObject:[NSNull null]];