Question

I am trying to copy the objects content of a NSDictionary to a NSMutableArray, and I am using the following code :

             // Use when fetching binary data
             NSData *responseData = [request responseData];

             // View the data returned - should be ready for parsing.
             resultsDictionary = [responseData objectFromJSONData];
             NSLog(@"ResultsDictionary:%@", resultsDictionary);

             self.OnlineObjects = [[[NSMutableArray alloc] init] autorelease];

             for (NSDictionary * dataDict in resultsDictionary) {
                 [OnlineObjects insertObject:dataDict atIndex:0];
             }

             NSLog(@"OnlineObjects:%@", OnlineObjects);

This is working as i am getting all objects from the Dictionary, but the objects order have been revers, first object is now last …

How can tell the insertObject to add the object at the last index ?

Thanks

Answer 1

You can use the addObject: method instead.

To get rid of the hash order problem get allKeys, sort the array and then use the elements as keys to get the objects in proper order.

Verbose example (for integer keys):

NSArray *indices = [[resultsDictionary allKeys] sortedArrayUsingComparator:^(id obj1, id obj2) {
    if ( [obj1 intValue] > [obj2 intValue] ) {
        return (NSComparisonResult)NSOrderedDescending;
    }
    if ( [obj1 intValue] < [obj2 intValue] ) {
        return (NSComparisonResult)NSOrderedAscending;
    }
    return (NSComparisonResult)NSOrderedSame;
}];

for (int i = 0; i < [indices count]; i++) {
    NSDictionary *obj = [resultsDictionary objectForKey:[indices objectAtIndex:i]];
    [OnlineObjects addObject:obj];
}