/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 vote192 views1 answer
Image preprocessing in python
Swift
2 votes199 views1 answer
Dark mode change immediately swift
Swift
0 vote230 views1 answer
Swift how to wait in a loop
Swift
1 vote182 views1 answer
How to check object is nil in swift
Swift
0 vote190 views1 answer
Swift paged scrollview get current page
Swift
0 vote222 views1 answer
Convert dictionary to array swift
Swift
1 vote182 views1 answer
Swift convert decimal to string
Swift
0 vote206 views6 answers
Free Robux codes
Swift
0 vote187 views2 answers
Weather api in ios swift 5
Swift
1 vote199 views1 answer
Decimal to Double conversion in Swift
Swift