/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 vote229 views2 answers
Hacker
Swift
1 vote216 views1 answer
Swift open web page
Swift
0 vote216 views1 answer
Swift completion handler
Swift
0 vote210 views1 answer
Textchange in textview swift
Swift
0 vote219 views1 answer
Switch button swift 5
Swift
1 vote232 views1 answer
Play sound swift stack overflow
Swift
1 vote230 views1 answer
Localized string format swift
Swift
0 vote231 views1 answer
Fullscreencover swiftui
Swift
6 votes230 views3 answers
Swift change background color
Swift
0 vote232 views1 answer
Make a VStack fill the width of the screen in SwiftUI
Swift