How to addObject of NSMutableDictionary to NSMutableArray in a loop

Question

Hi all,

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

try doing [workOrders addObject:[woRows copy]];

Answer 2

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

woRows = [[NSMutableDictionary alloc] init];

you are using same object...