Question

I have an NSMutableArray populated with NSIntegers. I need to loop through the array. I could do:

// given NSMutableArray *array of NSIntegers
NSUInteger n = [array count];
for (NSInteger i = 0; i < n; i++) {
  NSInteger x = [array objectAtIndex:i];
  // query SQLite WHERE id = x
}

However, it seems that a for (object in array) loop would be cleaner. iOS 5 does not accept NSIntegers or NSNumbers as objects in for-in loops. Should I loop through the array with NSObjects, casting the NSObject to an NSInteger during each iteration? Is there another way? Or is a for loop like the one above the cleanest solution to this problem?

Answer 1

In Objective-C you can use a for-in loop with NSNumber like this:

    NSArray *array = /*NSArray with NSNumber*/;

    for (NSNumber *n in array) {
        NSLog(@"i: %d", [n intValue]);
    }

Check this out.