How to release object of another class in our class? - objective-c

Question

I have created two classes (FirstClass and SecondClass) in command line application. I created an object of SecondClass in FirstClass method. Now I want to call that method in main and release the memory allocated to that object. My code is as follows..
#implementation FirstClass
+(NSMutableArray *) addObject{
NSMutableArray *namesArray = [[[NSMutableArray alloc]init] autorelease];
SecondClass *second = [[SecondClass alloc]init];
NSLog(#"Before adding object, count = %ld ",[second retainCount]); //RC = 1
[second setName:#"Mobicule"];
[namesArray addObject:second];
NSLog(#"First object addeded, count = %ld ",[second retainCount]); //RC = 2
[second release];
NSLog(#"After release, count = %ld",[second retainCount]); //RC = 1
return namesArray;
}
#end
I want to make retain count to zero..
And main function is as follows..
int main (int argc, const char * argv[]) {
#autoreleasepool {
// insert code here...
// NSLog(#"Hello, World!");
NSMutableArray *arrayMain = [[NSMutableArray alloc]init];
arrayMain = [FirstClass addObject];
for (int i = 0; i<[arrayMain count]; i++) {
NSLog(#"%#",[[arrayMain objectAtIndex:i] name]);
}
NSLog(#"%ld",[arrayMain retainCount]);
}
return 0;
}

Answer 1

I am assuming your synthesised property for name is retain.
+(NSMutableArray *) addObject{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSMutableArray *namesArray = [[NSMutableArray alloc]init];
SecondClass *second = [[[SecondClass alloc]init]autorelease];
NSLog(#"Before adding object, count = %ld ",[second retainCount]); //RC = 1
[second setName:#"Mobicule"]; //implementation will handle the release for you
[namesArray addObject:second];
NSLog(#"First object addeded, count = %ld ",[second retainCount]); //RC = 2
[pool release];
NSLog(#"After pool release, count = %ld",[second retainCount]); //RC=1
return [namesArray autorelease];
}
You should never use -retainCount, because it never tells you anything
useful.
Take a look at When to use -retainCount?