iCloud

Objective C apps can handle data synchronization and offline data storage through various techniques and frameworks. One common approach is to use CoreData, which is a framework provided by Apple for data management. CoreData allows developers to create a local database on the device, which can be used for storing and retrieving data even when the app is offline. Additionally, Objective C apps can implement data synchronization by using technologies like Apple’s iCloud or custom web services to transfer data between the device and a remote server when an internet connection is available. This ensures that data remains consistent across devices and can be accessed even when offline.