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iOS Build a Weather App with Swift (Retired) Data Modeling With Structures Cleaning Up Our Date

Justin Estrada
Justin Estrada
34,995 Points

fatal error: unexpectedly found nil while unwrapping an Optional value (lldb) ive been stuck for a couple hours

I know this is a pretty commomn problem due to misspellings and stuff, i am just extremely stuck

the line that is highlighted green and displays "exc_bad_instruction (code=exc_i386_invop subcode=0x0)" is :

currentTime = currentWeather["currentTime"] as Int

Justin Estrada
Justin Estrada
34,995 Points

// Current.swift file

import Foundation

struct Current {

var currentTime: Int
var temperature: Int
var humidity: Double
var precipProbability: Double
var summary: String
var icon: String

init(weatherDictionary: NSDictionary){

let currentWeather = weatherDictionary["currently"] as NSDictionary

    currentTime = currentWeather["currentTime"] as Int
    temperature = currentWeather["temperature"] as Int
    humidity = currentWeather["humidity"] as Double
    precipProbability = currentWeather["precipProbability"] as Double
    summary = currentWeather["summary"] as String
    icon = currentWeather["icon"] as String



Justin Estrada
Justin Estrada
34,995 Points

// // ViewController.swift

import UIKit

class ViewController: UIViewController {

private let apiKey = "c6ca594eab4a9053b9bf02212b474537"

override func viewDidLoad() {

    let baseURL = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/")

    let forecastURL = NSURL(string: "56.247928,-120.836373/", 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)



Dude! If you're still having trouble with this, I fixed the problem by double checking my API key. At one point I copied the instructor's code to fix a different problem, and I forgot to replace his API key with mine! So the download failed and I got a nil object at the downloadTask stage!