Declaring URL in Swift 3
Swift 3 has URL (a struct) and NSURL (a class, which it inherits from ObjC). The situation is like String and NSString. You have 2 options to approach this:
1: If you know the URL at the time of declaration:
let url = URL(string: "https://www.apple.com")2: If you can only find out about the URL later:
var url: URL!// You can check if the variable is initialized by checking it against nil:// if url == nil { /* not initialized */ }// When you are ready to assign it a value:url = URL(string: "https://www.apple.com")