Passing Data Through Segue (swift 2)

Question

This is a Tip Calculator Project and It must have a settings view where I select the default tip rate. I have some issues with passing data, when I select a default tip percenta

Answer 1

Replace you DefaultRate IBAction with this:

@IBAction func changevalue(sender: UISegmentedControl) { 

    var tipRate = [5, 10, 15, 20, 25, 30]
    tipRates = Double(tipRate[tipControl.selectedSegmentIndex])   
    delegate?.tipPercentageChanged(tipRates!) print("(tipRates)")
    NSUserDefaults.standardUserDefaults().setDouble(tipRates!, forKey: "DefaultTipRate")
    NSUserDefaults.standardUserDefaults().synchronize() 
}

And set the event as "Value Changed" as shown in the image below

Answer 2

I strongly recommend you go through a few introductory iOS & Swift tutorials online. SO is not the place to get beginner level understanding of programming topics. Some recommended tutorials:

Swift 2 Tutorial

Apple swift tutorials