Question

@interface ClassA : UITableViewController {

    NSString *member;
}

@end

The member is declare like above.

if I use

NSString * astring = [[NSString alloc] initWithString:@"???"];
member = astring;

Will the member retain the astring?

Answer 1

NO it will not retain it. This is instance varaible (also called iVar). It does not release old object and does not retain the new object (as a typical declared property in setter).

//If property
self.member = aString; // call setter, equivalent to [self setMember:aString], the old value is released and a retain (or copy depending on property declaration) message is sent to aString.

If iVar
member = aString //No memory management.