NSURL found nil while unwraping an Optional value

问题

Anyone knows why am I getting

fatal error: unexpectedly found nil while unwrapping an Optional value

When i use

    let URL = NSURL(string: "https://roads.googleapis.com/v1/snapToRoads?path=-35.27801,149.12958|-35.28032,149.12907")!

回答1:

The | character its not a valid URL character so you must replace it with percent escape character. Encoding whole string will do that automatically for you

var stringUrl = "https://roads.googleapis.com/v1/snapToRoads?path=-35.27801,149.12958|-35.28032,149.12907"

let URL = NSURL(string: stringUrl.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)!)!

回答2:

Swift 4

I was trying with :

https://api.url.com/method?token=abcdfghijklmopqrst&command=>SSSXP10<&otherParam=12345678

And the '>' and '<' characters was giving me the error.

For the solution :

let objectUrl = URL(string:url.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!)

回答3:

Oh, It's a crazy issue. Because of < and > it was giving an error

let username = searchTextFileld.text!
let urlString: String = "https://api.github.com/search/users?q=\(username)+repos:>100+followers:>100"

来源：https://stackoverflow.com/questions/28882954/nsurl-found-nil-while-unwraping-an-optional-value