X:code Spacing error anywhere?

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var QuestionLabel: UILabel!

@IBOutlet weak var Button1: UIButton!
@IBOutlet weak var Button2: UIButton!
@IBOutlet weak var Button3: UIButton!
@IBOutlet weak var Button4: UIButton!


var CorrectAnswer = String()

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

    RandomQuestions()
}

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



func RandomQuestions(){

    var RandomNumber = arc4random() % 4
    RandomNumber += 1

    switch(RandomNumber){
    case 1:

        QuestionLabel.text = "Who is the best soccer player in the world?"
        Button1.setTitle("Messi", forState: UIControlState.Normal)
        Button2.setTitle("Neymar", forState: UIControlState.Normal)
        Button3.setTitle("Bale", forState: UIControlState.Normal)
        Button4.setTitle("James", forState: UIControlState.Normal)
         CorrectAnswer = "2"

        break
    case 2:
        QuestionLabel.text = "How many goals is a hat trick?"
        Button1.setTitle("2", forState: UIControlState.Normal)
        Button2.setTitle("5", forState: UIControlState.Normal)
        Button3.setTitle("3", forState: UIControlState.Normal)
        Button4.setTitle("7", forState: UIControlState.Normal)
        CorrectAnswer = "3"

        break
    case 3:
        QuestionLabel.text = "What number is Neymar?"
        Button1.setTitle("2", forState: UIControlState.Normal)
        Button2.setTitle("5", forState: UIControlState.Normal)
        Button3.setTitle("3", forState: UIControlState.Normal)
        Button4.setTitle("11", forState: UIControlState.Normal)
        CorrectAnswer = "4"
        break

    case 4:
        QuestionLabel.text = "What number is messi?"
        Button1.setTitle("2", forState: UIControlState.Normal)
        Button2.setTitle("10", forState: UIControlState.Normal)
        Button3.setTitle("3", forState: UIControlState.Normal)
        Button4.setTitle("7", forState: UIControlState.Normal)
        CorrectAnswer = "2"



        break
    default:

        break
    }

}

@IBAction func Button1Action(sender: AnyObject) {

    if (CorrectAnswer == "1"){

        NSLog("You Are Correct")
    }
    else{
         NSLog("YOu Are Wrong")
    }
}
@IBAction func Button2Action(sender: AnyObject) {
    if (CorrectAnswer == "2"){

        NSLog("You Are Correct")
    }
    else{
        NSLog("YOu Are Wrong")
    }
}
@IBAction func Button3Action(sender: AnyObject) {
    if (CorrectAnswer == "3"){

        NSLog("You Are Correct")
    }
    else{
        NSLog("YOu Are Wrong")
    }
}
@IBAction func Button4Action(sender: AnyObject) {
    if (CorrectAnswer == "4"){

        NSLog("You Are Correct")
    }
    else{
    NSLog("You Are Correct")
    }
}

Could anyone help me with this I'm need to coding and i need help with this. i have look for any extra brackets i put and i have seen none any help?