/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

1 vote205 views3 answers
Swift 5 get app version
Swift
0 vote193 views1 answer
Swift isKindOf
Swift
0 vote280 views1 answer
String to double swift
Swift
0 vote191 views2 answers
How to Hide Password in Text field Swift
Swift
5 votes252 views1 answer
Round down swift
Swift
7 votes481 views1 answer
Time formats swift
Swift
0 vote198 views1 answer
UIApplicationWillEnterForeground
Swift
0 vote199 views1 answer
Navigation title bar color swftui
Swift
1 vote197 views1 answer
Uipageviewcontroller stop scrolling
Swift
0 vote206 views1 answer
Swift ease in out animatekeyframes
Swift