What should my Objective-C singleton look like? [closed]

Answer 1

I've not read through all the solutions, so forgive if this code is redundant.

This is the most thread safe implementation in my opinion.

+(SingletonObject *) sharedManager
{
    static SingletonObject * sharedResourcesObj = nil;

    @synchronized(self)
    {
        if (!sharedResourcesObj)
        {
            sharedResourcesObj = [[SingletonObject alloc] init];
        }
    }

    return sharedResourcesObj;
}