Question

Here is my NSArray

myArray = [NSArray arrayWithObjects: @"a", @"b", @"c", @"d", @"e", nil];

Now I’m looping through the array like this:

int size = [myArray count];
NSLog(@"there are %d objects in the myArray", size);

for(int i = 1; i <= size; i++) {
    NSString * buttonTitle = [myArray objectAtIndex:i]; 
    // This gives me the order a, b, c, d, e 
    // but I'm looking to sort the array to get this order
    // e,d,c,b,a

    // Other operation use the i int value so i-- doesn't fit my needs
}

In the for loop this gives me the order:

a, b, c, d, e 

but I’m looking to sort the array to get this order:

e, d, c, b, a

Any thoughts?

I need to keep the array in the original sort order as well.

Answer 1

Try calling reverseObjectEnumerator on the array and using a for-in loop to cycle through the objects:

NSArray *myArray = [NSArray arrayWithObjects:@"a", @"b", @"c", nil];

// Interate through array backwards:
for (NSString *buttonTitle in [myArray reverseObjectEnumerator]) {
    NSLog(@"%@", buttonTitle);
}

This will output:

c
b
a

Alternatively, you can reverse the array in place if you’d like to iterate through the array by index or do something else with it:

NSArray *reversedArray = [[myArray reverseObjectEnumerator] allObjects];