How to find out if the address of an object is 0x0?

Question

I want to check if my object address is 0x0. How to do this in objective c?

+3

Radislav May 17 '12 at 11:00

4 answers

if(object == nil){

// it means memory for this object is not allocated 

}

+3

Rohit dhawan May 17 '12 at 11:03

You can check the null pointer as follows:

if (!myObject) {
    // myObject is nil (0x0).
}

Or like this:

if (myObject == nil) {
    // myObject is nil (0x0).
}

+2

Drummerb May 17 '12 at 11:02

this address is zero, so you need to compare it with nil

+2

Inder kumar rathore · Accepted Answer · 2012-05-17T11:03:05+0000

Just compare the link as

if (obj == nil)

or

if (obj == NULL)

or

if (obj == 0)

or

if (!obj)

You can use any of them, they are all the same.