UIPickerView not registering the correct last row. Swift 2.0

Question

I have a 2 UIPickerView's, one called dayPicker where you have an option between 1-12 and durationPicker where you have the options of days, weeks, months and years.

The code for this is below:

class AddNewViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate {
    @IBOutlet weak var dayPicker: UIPickerView!
    @IBOutlet weak var durationPicker: UIPickerView!
    var durationDay: Double?
    var durationType: String?

    var durationPickerDataSource = ["Day(s)","Week(s)","Month(s)","Year(s)"];
     var dayPickerDataSource = ["1","2","3","4","5","6","7","8","9","10","11","12"];


func numberOfComponentsInPickerView(dayPickerView: UIPickerView) -> Int {
    return 1
}

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    if pickerView == durationPicker {
        return durationPickerDataSource.count;
    }
    else {
        return dayPickerDataSource.count;
    }
}


func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    if pickerView == durationPicker{
        durationType = durationPickerDataSource[row]
        print("")
        print("")
        print("\(row): type == \(durationType)")
        print("\(row)")
        print("")
        print("")

        return durationType
    }
    else {
        durationDay = Double(dayPickerDataSource[row])
        return dayPickerDataSource[row]
    }
}
 override func viewDidLoad() {
        super.viewDidLoad()

        self.durationPicker.dataSource = self;
        self.durationPicker.delegate = self;
        self.dayPicker.dataSource = self;
        self.dayPicker.delegate = self;
    }
}

when I select the rows in the simulator it prints all of the rows correctly apart from the last one where it prints "Week(s)".

I have the following constraints on the pickers:

dayPicker:

durationPicker:

Answer 1

Copied your code, everything seems to work fine. My only guess is that you are modifying your data sources and therefore the picker delegate returns the wrong information.

I tested your code (without modifications), the pickers display the correct values...

EDIT:

From the comment section it seems the problem lies in not having specified the UIPickerView's didSelectRow method, adding it seemingly solved the OP's problem (can't elaborate on the "why" though...):

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

    if pickerView == self.dayPicker{
      print("picked \(dayPickerDataSource[row])")
    }else {
      print("picked \(durationPickerDataSource[row])")
    }

  }