/Swift/Expression of type 'UIViewController?' is unused warning when pop view controller in swift 3.0

Expression of type 'UIViewController?' is unused warning when pop view controller in swift 3.0

@IBAction func goBackToIntroView(_ sender: UIButton) {
     
        self.navigationController?.popViewController(animated: true)
    }
//  popViewController(animated:) returnsUIViewController?
// , and the compiler is giving that warning since you aren't capturing the value. The solution is to assign it to an underscore:
// Answer

_ = navigationController?.popViewController(animated: true)

Source: developer.apple.com

Similar codes

0 vote367 views1 answer
Microsoft flight simulator uses which language
Swift
0 vote348 views1 answer
List header swiftui
Swift
0 vote364 views1 answer
How to clear text file swift
Swift
0 vote348 views1 answer
Swift get all cases starting with
Swift
0 vote363 views1 answer
Swift pass any closer to the function
Swift
0 vote408 views1 answer
How to set the spacing of a collection view swift
Swift
0 vote363 views1 answer
Code that detect input swift
Swift
0 vote392 views1 answer
How to make box shadow swift
Swift
2 votes405 views1 answer
Swift array to string
Swift
32 votes589 views10 answers
Google translate
Swift