Good to know that dev is still working on this project. The Zelcash walllet on iPhone will still be useable when the ZelNodes is released. Am I right?
If you are using the copay wallet, which is this one for iOS https://itunes.apple.com/us/app/zelcash-wallet/id1425452511?mt=8 then no, it will not work. The software does not allow for Sapling integration and we unfortunately will have to end support for the copay wallet.
You can either send all your coin to your new wallet, or use the web wallet at https://my.zel.cash to import your copay exported wallet, then send the coin to your new wallet from the web wallet.