Objective C: NSMutableArray does not retain objects

Question

I'm so stumped by this, I set the object in the array, but when I check it after they're all set, it comes up as (null)

for (int i = 0; i < [lines count]; i+=2) {
    [terms addObject:[lines objectAtIndex:i]];
    NSLog(@"%@",[terms objectAtIndex:i]);
}

Am I doing something wrong? terms is declared in the header, set as a property, and synthesized as an NSMutableArray

Answer 1

You have to first alloc and init the array before you use it. Setting the property makes it accessible outside the class and the synthesizer sets up the getter and setter but it doesn't alloc and init it.

NSMutableArray* terms = [[NSMutableArray alloc] init];