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alec apter
929 Pointsswitch statement from playground to Xcode
Hey guys, I want to import this switch function from a lesson into Xcode from a playground:
import GameKit let randomtemperature = GKRandomSource.sharedRandom().nextInt(upperBound: 150)
switch randomtemperature { case 0..<32: print("Its cold") case 32..<45: print("It's cold get a jacket") case 45..<70: print("light sweater") case 70...100: print("wear a shirt") default: print("stay inside") }
Whenever I try to, however, I am met with the error "statements are not allowed at the top level". I know that "top-level code is not allowed in most of your Swift source files, any executable statement not written within a function body, within a class, or otherwise encapsulated is considered top-level" but I can't seem to write it within a function body, class, or encapsulate it to make it work. Any help would be appreciated. Thanks.
alec apter
929 PointsHey Chris, Treehouse won't let me upload a screenshot but I'm using it in the ViewController right under
import UIKit class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
AKA the code that is already provided. Thanks!
2 Answers
Chris Stromberg
Courses Plus Student 13,389 PointsYour code needs to be placed within the ViewController class. See the example below.
import UIKit
import GameKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
// Your code should go here.
let randomtemperature = GKRandomSource.sharedRandom().nextInt(upperBound: 150)
switch randomtemperature { case 0..<32: print("Its cold")
case 32..<45: print("It's cold get a jacket")
case 45..<70: print("light sweater")
case 70...100: print("wear a shirt")
default: print("stay inside")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
alec apter
929 PointsThanks Chris your the man
alec apter
929 PointsAny chance you could help me with creating a button and a label so whenever the button is pushed, a random temperature is created and a case is printed? Iv'e been trying to use other online resources to help but can't get it right. thanks, I know this is a loaded question.
Chris Stromberg
Courses Plus Student 13,389 PointsYou will need to place a UIButton and UILabel onto your storyboard. Once these items are in place you can connect them to your viewcontroller's code where you see @IBOutlet and @IBAction. If your not sure how to do this I would recommend watching "Build a simple iphone app with swift" in the Treehouse Library.
import UIKit
import GameKit
class ViewController: UIViewController {
@IBOutlet weak var yourTextLabel: UILabel!
@IBAction func yourButton(_ sender: Any) {
let randomtemperature = GKRandomSource.sharedRandom().nextInt(upperBound: 150)
switch randomtemperature {
case 0..<32: yourTextLabel.text = "Its cold"
case 32..<45: yourTextLabel.text = "It's cold get a jacket"
case 45..<70: yourTextLabel.text = "light sweater"
case 70...100: yourTextLabel.text = "wear a shirt"
default: yourTextLabel.text = "stay inside"
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
yourTextLabel.text = "Press the Button"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Chris Stromberg
Courses Plus Student 13,389 PointsChris Stromberg
Courses Plus Student 13,389 PointsCould you paste an example of where you are trying to use it?