Question

I am creating ios app in xcode 4.2.
I have outside file with database. I dont wanna download data in every view. How should i create one global variable for tabbar application? And when should i upload this database before closing of application?

Answer 1

I use singletones like this: in class DataBase with some arrays of data i implement share method:

+(id)share
{
    static id share = nil;

    if (share == nil) {
        share = [[self alloc] init];
    }

    return share;
}

and then in some classes: self.dataBase = [DataBase share];