ViewController persist through segue - ios

Question

I don't know how to explain my problem that will show here is a video showing the problem(s) I am having: https://youtu.be/dfiwenMj6xc
As you can see the push segue back is sloppy. I want to keep the Alerts label in the top right with the correct data, and not have a flash. I also would like the image to go away and not have the jitter that is visible. Here is part of my code in my first view class:
class WeatherViewController: UIViewController, LocationServiceDelegate, UIViewControllerPreviewingDelegate{
var fromWarnignsViewController = false
var weatherAlerts: WeatherAlerts!
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"
var userLocation : String!
var userLatitude : Double!
var userLongitude : Double!
var userTemperatureCelsius : Bool!
var hourlyWeather2: Hourly!
var weeklyyWeather2: Weekly!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated);
if (!fromWarnignsViewController){
let currentLocation = LocationService.sharedInstance.lastLocation
userLatitude = currentLocation?.coordinate.latitude
userLongitude = currentLocation?.coordinate.longitude
let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
userTemperatureCelsius = defaults.boolForKey("celsius")
self.warningsLabel.hidden = true
}
}
func getCurrentWeatherData() -> Void {
let baseURL = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/")
let forecastURL = NSURL(string: "\(userLocation)", 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 = (try! NSJSONSerialization.JSONObjectWithData(dataObject!, options: [])) as! NSDictionary
let currentWeather = Current(weatherDictionary: weatherDictionary)
let weeklyWeather = Weekly(weatherDictionary: weatherDictionary)
self.hourlyWeather2 = Hourly(weatherDictionary: weatherDictionary)
self.weeklyyWeather2 = weeklyWeather
let hourlyWeather = self.hourlyWeather2
dispatch_async(dispatch_get_main_queue(), {
self.weatherAlerts = WeatherAlerts(weatherDictionary: weatherDictionary)
if(self.weatherAlerts.userAlert.count > 0){
self.warningsLabel.hidden = false;
let buttonTitle = String(self.weatherAlerts.userAlert.count) + " Alerts"
self.warningsLabel.setTitle(buttonTitle, forState: UIControlState.Normal)
self.warningsLabel.enabled = true
} else {
self.warningsLabel.hidden = true;
let buttonTitle = "0 Alerts"
self.warningsLabel.setTitle(buttonTitle, forState: UIControlState.Normal)
self.warningsLabel.enabled = false
}
});
}
})
downloadTask.resume()
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "warnings") {
let svc = segue.destinationViewController as! WarningsViewController;
svc.weatherAlerts = self.weatherAlerts
svc.userLocation = self.userLocation
svc.userLatitude = self.userLatitude
svc.userLongitude = self.userLongitude
svc.hourlyWeather2 = self.hourlyWeather2
svc.weeklyyWeather2 = self.weeklyyWeather2
svc.weatherViewController = self
}
}
func tracingLocation(currentLocation: CLLocation) {
// IF APPLICATION IS ACTIVE
if UIApplication.sharedApplication().applicationState == .Active {
self.userLatitude = currentLocation.coordinate.latitude;
self.userLongitude = currentLocation.coordinate.longitude;
activeLocationUpdate(currentLocation)
getCurrentWeatherData()
}
}
}
And here is the code in the alert view:
class WarningsViewController: UIViewController {
var weatherViewController: WeatherViewController!
var weatherAlerts: WeatherAlerts!
var userLocation : String!
var userLatitude : Double!
var userLongitude : Double!
var hourlyWeather2: Hourly!
var weeklyyWeather2: Weekly!
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
print(weatherAlerts.userAlert)
if (segue.identifier == "embed") {
let svc = segue.destinationViewController as! WarningTableViewController;
svc.weatherAlerts = self.weatherAlerts
} else if (segue.identifier == "back") {
let svc = segue.destinationViewController as! WeatherViewController;
svc.weatherAlerts = self.weatherAlerts
svc.userLocation = self.userLocation
svc.userLatitude = self.userLatitude
svc.userLongitude = self.userLongitude
svc.hourlyWeather2 = self.hourlyWeather2
svc.weeklyyWeather2 = self.weeklyyWeather2
svc.fromWarnignsViewController = true
}
}
}
It's a lot of code but I don't know how to condense. Any help would be greatlhy appreciated!