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iOS Build a Weather App with Swift Managing Complexity Grand Central Dispatch

Unable to gather weather Data

My application keeps on giving me an error that says "Could not construct a valid URL". does any one know how to fix this. This is my code:

    let forecastService = ForecastService(APIKey: forecastAPIKey)
    forecastService.getForecast(coordinate.lat, long: coordinate.long) {
        (let currently) in
        if let currentWeather = currently {
            dispatch_async(dispatch_get_main_queue()) {
                if let temperature = currentWeather.temperature {
                    self.currentTemperatureLabel?.text = "\(temperature)ΒΊ"
                }
                if let humidity = currentWeather.humidity {
                    self.currentHumidityLabel?.text = "\(humidity)%"
                }
                if let precipitation = currentWeather.precipProbability {
                    self.currentPrecipitationLabel?.text = "\(precipitation)"
                }


            }
        }
    }

2 Answers

Tommy Choe
Tommy Choe
38,156 Points

Hey John, I'm not sure if I'll be able to answer your question but my advice would be to just check your coordinates in the ViewController file. I messed up earlier because I didn't add a forward slash after my API key.

Let me know what happens.

Lee Adamson
Lee Adamson
9,347 Points

Tommy Choe i did this exact same thing with the trailing slash, spent ages looking through the code to find this.