循环的多个条件？

Question

I have this code now: This is iOS

   for(NSDictionary * dict in myMutableArray)
{
    NSString * str = [dict objectForKey:@"MyStringKey"];
    [sheet addButtonWithTitle:str];
}

I need to also have a for loop like this:

NSInteger *count = [myMutableArray count];
for (i = 0; i < count; i++) {
    arrayVar = [myMutableArray objectAtIndex:i];
}

I need to kind of combine these. I am inserting a segment into a UISegmentedControl while getting the name from a for loop which is looping through the array getting nsdictionary which is retrieving a nsstring that I will put into the uisegmentedcontrol.

So bottom line is I need to merge these for loops so I get the name like I do from the first for loop while still getting the objectatindex like it is in the second for loop.

How would I do this? Thanks!

Answer 1

The second version you have will work just fine. There is no way to access the index in the first version. There is a newer syntax available if you like, that uses blocks:

  NSArray *array;
  [array enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    NSDictionary *dict = (NSDictionary *)obj;
    // whatever else
  }];

The main benefit of blocks is they can use multiple cores in your device more effectively.