Cannot call value of non-function type 'URL'

Question

I am following The Complete iOS App Development Bootcamp by Angela, and I am in lesson 353. My question is how to solve the error "Cannot call value of non-function type 'URL'". My code so far is simply of three lines

import Cocoa
import CreateML

let data = try MLDataTable(contentsOf: URL(fileURLWithPath: "/Users/user/Documents/CurrentProjects/Work/Mini/Twittermenti-iOS13-master/twitter-sanders-apple3.csv"))

The instructor is not facing the problem on Xcode 10 Beta while I am on Xcode 11.3.1 but I face the problem while following the exact same code. Anyone knows how to solve it?

Do you have any variable or class/struct named URL that you have created yourself? What happens if you replace URL with Foundation.URL? — Joakim Danielson, Dec 19 '20 at 18:22
@JoakimDanielson I dont have any variable or class/struct named URL that I have created myself and when I add Foundation I receive error "Module 'Foundation' has no member named '<#T##URL#>'"Which I am not sure what even means — , Dec 19 '20 at 18:28
@JoakimDanielson based on usage of `MLDataTable` the OP is using MacOS, hence `import Cocoa` and not `Foundation` is correct. — timbre timbre, Dec 19 '20 at 19:19
@KirilS. Of course you can import only Foundation for macOS, I do it all the time — Joakim Danielson, Dec 19 '20 at 21:01
@Impostor_Syndrom_Incarnated could you perhaps include some more code related to the error, like the surrounding code lines? — Joakim Danielson, Dec 19 '20 at 21:06
Also, the following works fine for me `let url = Foundation.URL(fileURLWithPath: "/Users/...")` so in your case `let data = try MLDataTable(contentsOf: Foundation.URL(fileURLWithPath: "/Users/..."))` should work fine. — Joakim Danielson, Dec 19 '20 at 21:10
@KirilS. But you did bring up an interesting point, MLDataTable is MacOS only but OP is taking an iOS programming course so something is fishy here. — Joakim Danielson, Dec 19 '20 at 21:16
@Impostor_Syndrom_Incarnated Is this an iOS or a macOS project you are working on? — Joakim Danielson, Dec 19 '20 at 21:20

score 0 · Answer 1 · answered Dec 19 '20 at 19:18

Most likely somewhere you defined a variable like this:

hence you are overwriting a URL class (an instance of which you are trying to create), with your local variable.

Change your local variable to lower-case (which is Swift standard anyways), and it will work:

import Cocoa
import CreateML

var url: URL

let data = try MLDataTable(contentsOf: URL(fileURLWithPath: "/Users/user/Documents/CurrentProjects/Work/Mini/Twittermenti-iOS13-master/twitter-sanders-apple3.csv"))

Cannot call value of non-function type 'URL'

1 Answers1