Creating a task controller singleton for a task controller

gistfile1.txt

// This goes in the header file
+ (EntryController *)sharedInstance;

// This goes in the implementation file
+ (EntryController *)sharedInstance {
    static EntryController *sharedInstance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance = [[EntryController alloc] init];
    
        [sharedInstance loadFromDefaults];
    });
    return sharedInstance;
}