dispatch_once_t alternative in swift

Question

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'dispatch_once_t' is unavailable in Swift: Use lazily initialized globals instead

Here is my code:

class var sharedInstance:Model{
        struct Static{
            static var instance:Model?
            static var token: dispatch_once_t = 0
        }

        dispatch_once(&Static.token){
            Static.instance = Model()
        }
        return Static.instance!

    }

Please suggest me alternative method for dispatch_once_t..I dont know swift, I code C/C++/Obj.C, please give me swift code to fix above problem

Alternative for `dispatch_once()` or rather a good way to make singleton (commonly named `sharedInstance` in Objective-C) ? That's a different question. For singleton: https://stackoverflow.com/questions/24024549/using-a-dispatch-once-singleton-model-in-swift ? Mimicing exactly another language and not adapt it to your current one is not recommended. — Larme, Jun 30 '17 at 15:39
@Larme, thanks for your suggestions. Please give me swift version of code to fix above error...please answer — iPhoneProcessor, Jun 30 '17 at 15:46

adev · Accepted Answer · 2017-06-30T15:45:57.600

5

In swift singleton can be written as,

class Model: NSObject {
    static let sharedInstance = Model()
}

then use Model.sharedInstance. you dont need dispatch once like in objective c.

source https://thatthinginswift.com/singletons/

edited Jun 30 '17 at 15:45

answered Jun 30 '17 at 15:42

adev

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please change my code and what can be my updated code ? – iPhoneProcessor Jun 30 '17 at 15:44
Check now. Just add this only instead of your code in that class. – adev Jun 30 '17 at 15:46
thanks a lots. This fixed problem and working great. – iPhoneProcessor Jun 30 '17 at 15:50

dispatch_once_t alternative in swift

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