Question

Using the “Tab Bar” template in Xcode 4, each ViewController is created automatically, so I don’t have the chance to set any properties on a ViewController as it’s created. I want each ViewController to have access to an object (an instance of FMDB’s FMDatabase).

There are a number of questions on StackOverflow relating to this already, but some are assuming that you are creating the VC’s by hand, and others recommend using the AppDelegate as a mediator:

MyAppDelegateClass *appDelegate = [[UIApplication sharedApplicaton] delegate];
myLocalProperty = appDelegate.someDataModelProperty;

The above seems rather “hacky” to me. Is there a better way to access a single object from multiple ViewControllers?

Answer 1

Most probable implementation of FMDB’s Data base would be to implement it as a Singleton and access it through out the application. Is there any reason for not doing so ?

This link should help you in doing so:
How do I make FMDB's database a singleton