Object-c Nsset Type

Nsset is also a collection that, in combination with arrays, can hold data of the object type as a dictionary.

The set collection cannot hold the same object, its elements are not the same, and they are stored in an unordered order.

Note: The same elements can be stored in the set collection, but the same elements will be left only one after running. As follows:

Nil is not stored in the set set because nil is a set-end flag.

Create a Nsset object

Nsset *Set=[nsset setwithobjects:@"1",@"2",@"1",@"3",@"4",@"2",@"5",@"3", nil];

        NSLog (@ "%@",set);

The results of the operation are as follows:
for:53.48110.29. 1 [558:15953] {(    3,    4,     5 ,     1 ,     2 )}

Common methods of Nsmutableset:

set]; // Create an empty collection        Nsmutableset *set2=[nsmutableset setwithcapacity:ten];        [Set1 AddObject: @""]; // adding elements        [Set1 removeobject:@ ""]; // Delete Element

Object-c Nsset Type