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Editorial Team
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Asked: 2026-05-11T16:30:19+00:00

I don’t have enough Stack Overflow fu yet to have found a previous answer

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I don’t have enough “Stack Overflow fu” yet to have found a previous answer to this.

One of my apps has its data in a SQLite database and I’ve used the Apple SQLiteBooks sample as primary inspiration — however, SQLiteBooks has only a single table and a single view. I’ve got multiple (related) tables accessed as distinct views in a tab bar — e.g. Cookbooks, Recipes, Ingredients, Utensils, etc. Some issues with the sample code:

1) It seems that the sample code initializes too early (in applicationDidFinishLaunching: when I’m leaning towards viewDidLoad:)

2) The static SQL query strings need to be different per class (on the other hand, they generally only differ by the table being accessed, so can I use “?” in the static string and then bind the table ID as needed?)

3) If I follow the lead of TheElements sample code, which uses plists as data store, I seem to spend too much time and memory “pre-building” the data sources of the not-yet-viewed tabs.

Does anyone have pointers to best practices as to how/where to define multiple instances of the single class from the sample while keeping performance high and memory low?

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1 Answer

  1. Editorial Team

    You cannot use ? to bind table names, only values on the query.

    I suggest you take a look at FMDB which is a SQLite wrapper in Objective-C.

    With that, you can easily make different objects query the databases (some sort of home-grown ORM).

    There are a few ActiveRecord implementations in Objective-C that you may take a look at, but I haven’t used them.

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