The right-to-WRITE A SINGLETON

A trip down MEMORY LANE

@interface Kraken:nsobject @end @implementation Kraken+ (instancetype) sharedinstance {    static Kraken *sharedinstance = nil;     Static dispatch_once_t Oncetoken;    Dispatch_once (&oncetoken, ^{        = [[Kraken alloc] init];    });     return sharedinstance;} @end

 the ugliest (a.k.a. The "Why is still CODING in SWIFT IF you ' RE JUST going to do this" "

class Theoneandonlykraken {    class  var sharedinstance:theoneandonlykraken {        struct  Static {            static0            static var instance:theoneandonlykraken? = Nil        }        Dispatch_once (&static.oncetoken) {            = theoneandonlykraken ()        }         return static.instance!     }}

The STRUCT (a.k.a. The "old but strangely still POPULAR")

class Theoneandonlykraken {    class  var sharedinstance:theoneandonlykraken {        struct  Static {            static Let instance = Theoneandonlykraken ()        }        return  static.instance    }}

The GLOBAL VARIABLE (a.k.a. The "one line SINGLETON")

private Let Sharedkraken = theoneandonlykraken ()class  theoneandonlykraken {     class var sharedinstance:theoneandonlykraken {        return  sharedkraken    }}

The right-a.k.a. "The One line SINGLETON (now with proof!")

class Theoneandonlykraken {    static Let sharedinstance = Theoneandonlykraken ()}

DON ' T Forget the PRIVATE init!

class Theoneandonlykraken {    static Let sharedinstance = theoneandonlykraken ()      Private//Thisprevents others from using the default ' () ' initializer for this class.}

From:http://krakendev.io/blog/the-right-way-to-write-a-singleton

The right-to-WRITE A SINGLETON