/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 vote415 views1 answer
Find object in array by property swift
Swift
0 vote365 views2 answers
Bold world in text swift
Swift
0 vote410 views2 answers
Swift get file size from url
Swift
0 vote432 views1 answer
Accessing tab bar item action swift
Swift
0 vote382 views1 answer
Move to nect cell of collection after some time automatically in ios swift
Swift
0 vote404 views1 answer
Swift loop through 2 arrays at once
Swift
0 vote370 views1 answer
Swift class init
Swift
0 vote361 views1 answer
Swift out of bound elelemnt
Swift
7 votes550 views1 answer
Dart capitalize first letter of each word
Swift
2 votes374 views2 answers
Detect binding valu change swiftui
Swift