NSMutableArray - Add array at start

Question

It is a simple pull to refresh case. I have data loaded into table and have a mutable data array at back-end, I receive a array of new data and want to add this complete array a

Answer 1

First, build an NSIndexSet.

NSIndexSet *indexes = [NSIndexSet indexSetWithIndexesInRange:
    NSMakeRange(0,[newArray count])];

Now, make use of NSMutableArray's insertObjects:atIndexes:.

[oldArray insertObjects:newArray atIndexes:indexes];

---

Alternatively, there's this approach:

oldArray = [[newArray arrayByAddingObjectsFromArray:oldArray] mutableCopy];