Best way to convert NSArray from NSString to NSArray from NSNumber

Is there a better way to convert NSArray

from NSString

to NSArray

of NSNumber

than the following code:

-(NSArray*) convertStringArrayToNumberArray:(NSArray *)strings {
    NSMutableArray *numbers = [[NSMutableArray alloc] initWithCapacity:strings.count];
    for (NSString *string in strings) {
        [numbers addObject:[NSNumber numberWithInteger:[string integerValue]]];
    }
    return numbers;
}