Swift - Text Input in UIAlertView

Question

I have two errors here. I'm trying to get a UIAlertView that comes up when the button is pressed. From there, I want the user to input a new number (Double) and then have it update the variable timeWorkedGoal as well as the timeWorkedGoalNumber label.

I'm getting the error "Use of unresolved identifier 'UIKeyboardTypeNumberPad'" as well as the error "Reference to property 'timeWorkedGoalNumber' in closure requires explicit 'self'. to make capture semantics explicit." Does anybody know how my syntax is off? Thanks!

var timeWorkedGoal = 1.1 @IBOutlet weak var timeWorkedGoalNumber: UILabel! @IBAction func resetTimeWorkedGoalButton(sender: AnyObject) { var timeWorkedAlert = UIAlertController(title: "Time Worked", message: "Your current work time goal is \(timeWorkedGoal) hours – Enter your new goal.", preferredStyle: UIAlertControllerStyle.Alert) timeWorkedAlert.addTextFieldWithConfigurationHandler { (textField) in } timeWorkedAlert.addAction(UIAlertAction(title: "Submit", style: .Default, handler: { (action) in let textF = timeWorkedAlert.textFields![0] as UITextField print(textF) textF.keyboardType = UIKeyboardTypeNumberPad; timeWorkedGoal = (Double("\(textF)"))! print(timeWorkedGoal) timeWorkedGoalNumber.text = "\(textF)" })) timeWorkedAlert.addAction(UIAlertAction(title: "Cancel", style: .Default, handler: { (action) in self.dismissViewControllerAnimated(true, completion: nil) })) self.presentViewController(timeWorkedAlert, animated: true, completion: nil) }

Vivek Molkar · Accepted Answer · 2016-06-27 05:40:14Z

Error "Use of unresolved identifier 'UIKeyboardTypeNumberPad'"

Use textF.keyboardType = UIKeyboardType.NumberPad

Reference to property 'timeWorkedGoalNumber' in closure requires explicit 'self'

Explains itself. Instead of just using timeWorkedGoalNumber use self.timeWorkedGoalNumber

also you need to update timeWorkedGoal = (Double("\(textF)"))! to self.timeWorkedGoal = (Double("\(textF)"))!

EDIT: textF is a type of UITextField so cannot be directly cast to a Double. Insted you can use textF.text that will return you a String. So you will have something like this Double("\(textF.text)")

thanks for the solution. I'm still getting the following error. i.imgur.com/CfanKyi.png

impression7vx · Accepted Answer · 2016-06-26 06:01:40Z

First Question:

textF.keyboardType = UIKeyboardType.UIKeyboardTypeNumberPad

Second Question:

Add

self.timeWorkedGoal = (Double("\(textF)"))!

instead it was previously

timeWorkedGoal = (Double("\(textF)"))!

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