Question

in these 3 lines of code, there is this “delegate”, i cannot find it anywhere else in the code, even not in the FruitsAppDelegate. I can’t remember what it stands for : is it a convention? does it automatically stands for AppDelegate?

// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    FruitAppDelegate *appDelegate = (FruitAppDelegate*)[[UIApplication sharedApplication] delegate];
    return appDelegate.fruits.count;
}

thanks

Answer 1

UIApplication defines a delegate that must adopt the UIApplicationDelegate protocol and implement some of the protocol methods. Every application must have a delegate.
In your case it is FruitAppDelegate.