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iOS Build a Weather App with Swift (Retired) Displaying Our Weather Data Connecting the UI to Our Model

Guy Barr
Guy Barr
2,202 Points
Posted by Guy Barr
Guy Barr
2,202 Points

Unwrapping issues

I seem to be having issues now with my app crashing. Seems to be from what looks like the return from the URL not unwrapping properly. Have spent hours trying to fix. Has anyone got any ideas??

before this tutorial, when working through the connection to forecast.io etc, was able to pull back data but when trying to pull just the temp back, the full weather information was returned in curly braces with the temp on the bottom of it

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var iconView: UIImageView!
    @IBOutlet weak var currentTimeLabel: UILabel!
    @IBOutlet weak var temperatureLabel: UILabel!
    @IBOutlet weak var humidityLabel: UILabel!
    @IBOutlet weak var precipitationLabel: UILabel!
    @IBOutlet weak var summaryLabel: UILabel!



    private let apiKey = "REMOVED"



    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        let baseUrl = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/")
        let forecastURL = NSURL(string: "-22.385586,143.036956?units=si", relativeToURL: baseUrl!)




        let sharedSession = NSURLSession.sharedSession()
        let downloadTask: NSURLSessionDownloadTask = sharedSession.downloadTaskWithURL(forecastURL!, completionHandler: { (location: NSURL!, response: NSURLResponse!, error: NSError!) -> Void in

            if (error == nil) {
                let dataObject = NSData(contentsOfURL: location)
                let weatherDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject!, options: nil, error: nil) as NSDictionary

                let currentWeather = Current(weatherDictionary: weatherDictionary)

                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                    self.temperatureLabel.text = "\(currentWeather.temperature)"
                    self.iconView.image = currentWeather.icon!
                    self.currentTimeLabel.text = "At \(currentWeather.currentTime!) it is"
                    self.humidityLabel.text = "\(currentWeather.humidity)"
                    self.precipitationLabel.text = "\(currentWeather.precipProbability)"
                    self.summaryLabel.text = "\(currentWeather.summary)"
                })

            }

        })

        downloadTask.resume()

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}