Beginning iOS 10 Part 1 Getting Started - Part 2: | Ray Wenderlich

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1

This video introduces you to the world of iOS and will walk you through the process of making a game from the ground up.

This is a companion discussion topic for the original entry at https://www.raywenderlich.com/3760-beginning-ios-10-part-1-getting-started/lessons/2
2

I am having trouble with Xcode; it returns a “Could not insert new action connection” message when I try to establish a new action connection between storyboard and the view controller.

Here is what the error message looks like.

Screen Shot 2017-03-02 at 8.28.50 PM.png1041×865 86.1 KB

3

mine worked using
@IBAction func tappedRed(sender: AnyObject) {
view.backgroundColor = UIColor.redColor()
}
@IBAction func tappedBlue(sender: AnyObject) {
view.backgroundColor = UIColor.blueColor()
}
@IBAction func tappedGreen(sender: AnyObject) {
view.backgroundColor = UIColor.greenColor()

says cannot find ‘UIcolor’ every time i type .red .blue .green

4

Hey guys,

For the error “Could not insert new action connection” - Make sure that you do not have any other actions referencing to the view controller. Here is a great link to solve your problem. ios - Could not insert new outlet connection: Could not find any information for the class named - Stack Overflow

@pdenlinger - Interesting how yours did not work using the .red .blue .green properties on UIColor. This is my code and it ran fine.

@IBAction func blueBackground(_ sender: Any) {
    view.backgroundColor = UIColor.blue
}

@IBAction func greenBackground(_ sender: Any) {
    view.backgroundColor = UIColor.green
}

@IBAction func redBackground(_ sender: Any) {
    view.backgroundColor = UIColor.red
}
5

My solution using a single function and a switch statement:

class ViewController: UIViewController {
@IBAction func changeColor(_ sender: UIButton!) {
    let currentSelection = sender.currentTitle!
    print(currentSelection)
    
    switch currentSelection {
    case "Red":
        view.backgroundColor = UIColor.red
    case "Blue":
        view.backgroundColor = UIColor.blue
    case "Green":
        view.backgroundColor = UIColor.green
    default:
        print ("Error")
    }
    
}
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