Why Can't I Call the Default Super.Init() on Uiviewcontroller in Swift

Why can't I call the default super.init() on UIViewController in Swift?

The designated initialiser for UIViewController is initWithNibName:bundle:. You should be calling that instead.

See http://www.bignerdranch.com/blog/real-iphone-crap-2-initwithnibnamebundle-is-the-designated-initializer-of-uiviewcontroller/

If you don't have a nib, pass in nil for the nibName (bundle is optional too). Then you could construct a custom view in loadView or by adding subviews to self.view in viewDidLoad, same as you used to.

Error in Swift class: Property not initialized at super.init call

Quote from The Swift Programming Language, which answers your question:

“Swift’s compiler performs four helpful safety-checks to make sure
that two-phase initialization is completed without error:”

Safety check 1 “A designated initializer must ensure that all of the
“properties introduced by its class are initialized before it
delegates up to a superclass initializer.”

Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks.
https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11

Swift: Must call a designated initializer of the superclass error even though code is doing so

The problem there is that you are also trying to access your PreviewNode properties before calling self.init()

Try like this:

Xcode 8 GM • Swift 3

class PreviewNode: SCNNode {
    let previewNodeColor: UIColor = .red
    let size: CGFloat = 1
    let chamferRadius: CGFloat = 0
    convenience override init() {
        self.init()
        let previewBox = SCNBox(width: size, height: size, length: size, chamferRadius: chamferRadius)
        previewBox.firstMaterial?.diffuse.contents = previewNodeColor
        previewBox.firstMaterial?.transparency = 0.2
        previewBox.firstMaterial?.specular.contents = UIColor.white
        self.geometry = previewBox
    }
}

How do I make a custom initializer for a UIViewController subclass in Swift?

class ViewController: UIViewController {
        
    var imageURL: NSURL?
    
    // this is a convenient way to create this view controller without a imageURL
    convenience init() {
        self.init(imageURL: nil)
    }
    
    init(imageURL: NSURL?) {
        self.imageURL = imageURL
        super.init(nibName: nil, bundle: nil)
    }
    
    // if this view controller is loaded from a storyboard, imageURL will be nil
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
}

Custom init in Swift Class giving 'property not initialized at implicitly generated super.init call' error?

In swift you most have all variables initialize before super.init unless declared optional, in your case you have two variables that need to be initialized, because you are initializing your variables inside an is statement swift is not sure if it will actually be initialize if the if statement fail.
Change your code to:

var coordinate: CLLocationCoordinate2D?
var title: String?
var subtitle: String?

In case you really don't care if those variables are initialize, or make sure to initialize them with something in the init method.
In the endo you with all variables initialized and/or optional you will be able to call: super.init()

I hope that helped you

Property 'self.*' not initialized at super.init call

You have to initialize all property before you call super.init in any init method

So,change this before you call super.init()

originView = sourceView //error here

Exception:

1. optional property
2. property with default value
3. lazy property

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