Question

in a header file I defined

NSMutableArray *numbers;

In the implementation I initialize this array first in the init method

numbers = [[NSMutableArray alloc] init];

I add strings to this array

[numbers insertObject:number atIndex:[numbers count]];

But when I access the array like this in another method

NSLog(@"%@", [numbers count]);

the application crashes. Any idea why this happens?

Answer 1

You are wrong here –

NSLog(@"%@", [numbers count]);

Array count is an integer value. Use %d instead of %@ to print integer.

NSLog(@"%d", [numbers count]);