A Code Sample to use Core Data Stack as a Singleton

I used to create an instance of my Core Data Stack in AppDelegate file and accessed it from other View Controllers. But I have to modify it because iOS 11 forces to access AppDelegate file in the main thread. So I made my Core Data Stack as a singleton.

If you are looking for a code sample to make your core data stack as a singleton. Please refer the code below.

class func sharedInstance() -> CoreDataStack {
    struct Static {
        static let instance = CoreDataStack()
    }
    return Static.instance
}

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How can I detect iPhone X's screen size?

How can I detect iPhone X’s screen size?

After Apple released iPhone X I am trying to update my application for iPhone X. The UI elements to fit iPhone X I have to detect the screen size of iPhone X and I found the code below which works for me.

if UIDevice().userInterfaceIdiom == .phone {
        switch UIScreen.main.nativeBounds.height {
        case 1136:
            print("iPhone 5 or 5S or 5C")
        case 1334:
            print("iPhone 6/6S/7/8")
        case 2208:
            print("iPhone 6+/6S+/7+/8+")
        case 2436:
            print("iPhone X")
        default:
            print("unknown")
        }
    }

• source

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