CODEWITHSUNDEEP
iosindexingnullnsarray
Rahul
Rahul

Reputation: 211

Check if array is NULL at specific index in iOS

I have an arra which contains be 5 values. But I know at least on one index the value will be NULL. I've tried something like this

if ([array objectAtIndex:2]!=nil) //Right now array contains 5 values in total
{
       //do something
}

But it doesn't seem to work as I know that at index 2 there is no value but still goes INTO the "if" Statement.

Upvotes: 2

Views: 2428

Answers (2)

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 727137

Your code should work. Checking != nil is unnecessary, and you can use array index operator, so you can write

if (array[2]) {
    ...
}

If the code goes into the conditional, there is an object at array[2]. Add NSLog call to see what's there:

if (array[2]) {
    NSLog(@"Element 2 is '%@'", array[2]);
    // ... The rest of your code
}

I get Element 2 is " output

Then it's an empty string. Use

if ([array[2] length]) {
    ...
}

to check for it.

Upvotes: 4

Muhammad Waqas Bhati
Muhammad Waqas Bhati

Reputation: 2805

You can use this code to check object exist at index 

if ([array objectAtIndex:2]) 
{
   //object Exist
}
else
{

  //Object not Exist
}

Upvotes: 0

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