CODEWITHSUNDEEP
xcodeswiftglobalvarmutable
Gabriel Waibel
Gabriel Waibel

Reputation: 11

Mutable Global Variable in Swift

I would like to know if there is a way to create a mutable global variable in Swift? I know that I can declare constants, but I want to change the value.

Thanks

Upvotes: 1

Views: 1070

Answers (2)

Gabriel M.
Gabriel M.

Reputation: 128

you can write

class myViewController : UIViewController{
struct GlobalVar{
static var myName : String?
}
override func viewDidLoad(){
super.viewDidLoad()
}
}

in any view controller and access it anywhere by:

//Another VC viewDidload
GlobalVar.myName = "Hello"
print(GlobalVar.myName)

Upvotes: 0

Duncan C
Duncan C

Reputation: 131491

In swift, you declare variables with var and constants with let.

If you want a global variable, create it a the top of a file, outside of the definition of any enclosing class/struct/enum/etc.

If you will access that variable from multi-threaded code as @DánielNagy mentions in his comment, it's more complex. However accessing global variables from concurrent code is best avoided.

Upvotes: 1

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