CODEWITHSUNDEEP
swift3
Jeroen Swets
Jeroen Swets

Reputation: 225

result of closure in function to variable in swift 3

I've got a function which does an asynchrone call

func getToken(completionHandler:@escaping (_ stringResponse: String) -> Void) {
var testResult: String! = "20,5º"
let url: String! = "https://the.base.url/token"
let parameters: Parameters = [
    "key":"value"
    ]
Alamofire.request(url, method: .post, parameters: parameters, encoding: URLEncoding(destination: .methodDependent)).validate().responseJSON { response in
    switch response.result {
    case .success:
        testResult = "21º"
    case .failure(let error):
        testResult = error as! String
    }
    completionHandler(testResult)
}
}

And I call this function

getToken(completionHandler: {
     (stringResponse: String) in
     print(stringResponse)
     })

And it nicely prints 21º as I can see in the debugger. However, the final value of stringResponse should end up in

lblTemp.setText(String(//here the results of stringResponse))

How do I do this? I'm guessing it must be incredible simple.

Upvotes: 0

Views: 64

Answers (1)

Shabir jan
Shabir jan

Reputation: 2427

You need to do it like that 

getToken(completionHandler: { [weak self] (stringResponse: String) in
    DispatchQueue.main.async {
        self?.lblTemp.text = stringResponse
    }
})

Upvotes: 1

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