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I am building an iPhone application .In the database I have 5000 records. Among them I am displaying only 50 in the app. But I want to ask would there be any memory issue if I create 5000 empty cells in the iPhone view initially even though I am displaying 50 rows of data?
If you build your table appropriately, you will only be using a handful to perhaps a dozen actual UITableViewCell objects which are constantly recycled as things show on screen.
Even 50 would be safe.
Having 5000 data objects in memory with 50 UITableViewCells should be pretty acceptable.
Especially if those data objects are small, or you are allowing CoreData to do some work for you with managing your data set.
The important thing is DO NOT MAKE 5000 TABLE CELL VIEWS. That is extremely poor practice.