Most of the time HTML doesn't load first time - ios

Question

I have this app that I made with Swift, for fun and because I'm a beginner. Basically what it does is you can enter an artist name and song name and it fetches lyrics from AZLyrics.com based on the artist and song name you entered. For some reason most of the time when I try and load lyrics the first time when I open the app it doesn't load (it loads the 2nd, 3rd, 4th etc time). Here is my code could someone please tell me how I could fix this?
First View controller
import UIKit
var lyricsWithQuotes = ""
var urlError = false
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet var songName: UITextField!
#IBOutlet var artistName: UITextField!
#IBAction func search(sender: AnyObject) {
var url = NSURL(string: "http://www.azlyrics.com/lyrics/" + artistName.text.stringByReplacingOccurrencesOfString(" ", withString: "").stringByReplacingOccurrencesOfString("'", withString: "").stringByReplacingOccurrencesOfString(",", withString: "").stringByReplacingOccurrencesOfString(".", withString: "").lowercaseString + "/" + songName.text.stringByReplacingOccurrencesOfString(" ", withString: "").stringByReplacingOccurrencesOfString("'", withString: "").stringByReplacingOccurrencesOfString(",", withString: "").stringByReplacingOccurrencesOfString(".", withString: "").lowercaseString + ".html")
if url != nil {
let task = NSURLSession.sharedSession().dataTaskWithURL(url!, completionHandler: { (data, response, error) -> Void in
if error == nil {
var urlContent = NSString(data: data, encoding: NSUTF8StringEncoding) as NSString!
var urlContentArray = urlContent.componentsSeparatedByString("<!-- Usage of azlyrics.com content by any third-party lyrics provider is prohibited by our licensing agreement. Sorry about that. -->")
if urlContent.containsString("It's a place where all searches end!") {
urlError = true
} else {
var lyricsArray = urlContentArray[1].componentsSeparatedByString("<br><br>")
var lyrics = lyricsArray[0] as! String
var lyricsWithoutBR = lyrics.stringByReplacingOccurrencesOfString("<br>", withString: "")
var lyricsWithoutSlashDiv = lyricsWithoutBR.stringByReplacingOccurrencesOfString("</div>", withString: "")
var lyricsWithoutI = lyricsWithoutSlashDiv.stringByReplacingOccurrencesOfString("<i>", withString: "")
var lyricsWithoutSlashI = lyricsWithoutI.stringByReplacingOccurrencesOfString("</i>", withString: "")
lyricsWithQuotes = lyricsWithoutSlashI.stringByReplacingOccurrencesOfString(""", withString: "\"")
}
} else {
urlError = true
}
})
task.resume()
} else {
urlError = true
}
}
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
view.endEditing(true)
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
override func viewDidLoad() {
super.viewDidLoad()
artistName.delegate = self
songName.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Second View Controller
import UIKit
var lyricsComplete = ""
class ViewController2: UIViewController {
#IBOutlet var lyricsDisplay: UITextView!
override func viewDidAppear(animated: Bool) {
if urlError == true {
urlError = false
lyricsDisplay.text = "Couldn't find that song!"
} else {
lyricsComplete = lyricsWithQuotes
lyricsDisplay.text = lyricsComplete
}
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 1

After your NSURLSession has completed - basically this line:
lyricsWithQuotes = lyricsWithoutSlashI.stringByReplacingOccurrencesOfString(""", withString: "\"")
You have two options:
Option One - Programatically launch the view:
let storyboard = UIStoryboard(name: "STORYBOARD NAME HERE", bundle: nil)
let newVC = storyboard.instantiateViewControllerWithIdentifier("VIEW CONTROLLER IDENTIFIER HERE") as! ViewController2
newVC.lyricsComplete = lyricsWithQuotes
If you have a navigation controller:
self.navigationController?.pushViewController(newVC, animated: true)
If you don't have a navigation controller:
self.showViewController(newVC, sender: self)
Options 2 - Trigger the Segue:
performSegueWithIdentifier("SEGUE NAME HERE", sender: nil)
Then intercept the Segue
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
if(segue.identifier == "SEGUE NAME HERE"){
let newVC = segue.destinationViewController as! ViewController2
newVC.lyricsComplete = lyricsWithQuotes
}
}
If you use option 2, make sure the Segue is between the View Controllers and not attached to your button:
Like this:
Not like this: