Cannot convert value of type 'String' to expected argument type 'URLSession'

Question

I use Alamofire 4.0, Swift 4.2 and Xcode 10.2 to request Http Api I have url constant:

let weatherUrl = "http://api.openweathermap.org/data/2.5/weather"

And function:

func getWeatherData(url: String, parameters: [String : String])
    {
        Alamofire.Request(url, parameters: parameters).responseJSON
        {
                response in
        }

getWeatherData(url: weatherUrl, parameters: params)

And Xcode notify me:"Cannot convert value of type 'String' to expected argument type 'URLSession'".

Alamofire

What is the problem?

shouldnt one of your parameters be [URL : String] or [String: URL] ? you also defined url:String , should it be url: URL — Julian Silvestri
– Julian Silvestri, Commented Jan 28, 2019 at 18:18
Which line? Which variable? Provide details in your question. — rmaddy
– rmaddy, Commented Jan 28, 2019 at 18:21
@rmaddy in line: Alamofire.Request(url, method: .get, parameters: parameters).responseJSON. I have updated the image of the problem! — Elise
– Elise, Commented Jan 28, 2019 at 18:25
The error is pretty clear. The first argument in the call to Alamofire.Request needs to a URL, not a String. — rmaddy
– rmaddy, Commented Jan 28, 2019 at 18:27

Bhushan Mahajan · Accepted Answer · 2019-01-28 18:50:55Z

0

You can try with as following code. Because URL is of type URLConvertible.

let url = URL(string: myURLString)

answered Jan 28, 2019 at 18:50

Bhushan Mahajan

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Comments

Jon Shier · Accepted Answer · 2019-01-28 19:02:45Z

0

You're using Request, which is a type, and not request, which is the method you're looking for.

answered Jan 28, 2019 at 19:02

Jon Shier

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