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iOS Network Programming with Swift 2 Modeling Forecast Data Stubbing the Data

Cagri Mehmet Calis
Cagri Mehmet Calis
5,791 Points
Posted by Cagri Mehmet Calis
Cagri Mehmet Calis
5,791 Points

"Extension" problem in ViewController.swift file

When I try to write below code in ViewController.swift file, there is an error occurs. (Declaration is only valid at file scope)

extension CurrentWeather { var temperatureString: String { return "(Int(temperature))" } }

When I write this code snippet in CurrentWeather.swift file that's OK.

How can I solve this problem? Xcode Version 7.3.1

Tee Abdul
Tee Abdul
8,411 Points

Check out this answer: https://stackoverflow.com/questions/28554231/about-declaration-is-only-valid-at-file-scope

*Also make sure to put "\" in your return statement.

    var temperatureString: String {
        return "\(Int(temperature))º"
    }

1 Answer

Nathaniel Coleman
Nathaniel Coleman
1,052 Points
Nathaniel Coleman
Nathaniel Coleman
1,052 Points

The extension declaration should be right after the import statement and before the class ViewController: UIViewController... declaration. This way the scope of the extension is broad enough to reach the entire project and not just the ViewController file.