Refresh Button Crash

post your code where you call the refresh method and where you define the method itself

The code can be found in course "Build a Weather App with Swift" -> "Adding a Refresh Button" I only included the parts related to the refresh button below. The only difference is I named precipitationLabel as rainLabel; if I name it precipitationLabel it will run into an error:

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<Stormy.ViewController 0x7c843580> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key rainLabel.'

Thanks.

The following is the code after i changed the precipitationLabel to rainLabel:

```class ViewController: UIViewController { ... @IBOutlet weak var refreshButton: UIButton! @IBOutlet weak var refreshActivityIndicator: UIActivityIndicatorView!

override func viewDidLoad() {
    super.viewDidLoad()
    refreshActivityIndicator.hidden = true
    getCurrentWeatherData()
}

func getCurrentWeatherData() -> Void { ... ... ... self.rainLabel.text = "(currentWeather.precipProbability)" ...

                //Stop refresh animation
                self.refreshActivityIndicator.stopAnimating()
                self.refreshActivityIndicator.hidden = true
                self.refreshButton.hidden = false
            })                
        }            
    })        
    downloadTask.resume()
}

@IBAction func refresh() { getCurrentWeatherData() refreshButton.hidden = true refreshActivityIndicator.hidden = false refreshActivityIndicator.startAnimating() } }