How to addObject of NSMutableDictionary to NSMutableArray in a loop

Question

I'm having difficulty to add a data structure to an array to create an array of dictionaries from a loop. I just knew that addObject in NSMutableArray only add pointer to it. I would like to know how to achieve my goal.

Here's my code:

NSMutableDictionary *woRows = [[NSMutableDictionary alloc] init];
NSMutableArray *workOrders = [[NSMutableArray alloc] init];
while ([theScanner isAtEnd] == NO)
{
    if ([theScanner scanUpToCharactersFromSet:usSet intoString:&tempCol1] &&
        [theScanner scanString:@"{US}" intoString:NULL] &&
        [theScanner scanUpToCharactersFromSet:usSet intoString:&tempCol2] &&
        [theScanner scanString:@"{US}" intoString:NULL] &&
        [theScanner scanUpToCharactersFromSet:usSet intoString:&tempCol3]&&
        [theScanner scanString:@"{RS}" intoString:NULL])
    {
        [woRows  setValue:tempCol1 forKey:@"hours"];
        [woRows setValue:tempCol2 forKey:@"colMain"];
        [woRows setValue:tempCol3 forKey:@"colAddtl"];

        [workOrders addObject:woRows];
        [woRows release];
    }
}
[tmpString release];
[jobs addObject:workOrders];
[workOrders release];

from the code above, the array workOrders will have duplicates of last objects added only. I stuck here not able to progress to display the correct data.

Any help will be appreciated.

Thanks

Answer 1

尝试做[workOrders addObject:[woRows copy]];

Answer 2

我知道，这有点晚了，甚至不是您要的，但是我想您想使用[woRows setObject:forKey:]而不是[woRows setValue:forKey:] 。

Answer 3

move your dictionary creation code inside the loop(inside if condition)

woRows = [[NSMutableDictionary alloc] init];

you are using same object...