/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 vote144 views1 answer
Get device height spritekit
Swift
2 votes157 views1 answer
How do change title color in navigation bar
Swift
0 vote147 views1 answer
Add shadow to specific corner of UIView with shadow swift 6 site:stackoverflow.com
Swift
1 vote138 views1 answer
Swift programming language wikipedia
Swift
0 vote144 views1 answer
Declare empty string in swift
Swift
1 vote90 views1 answer
How to swift pie chart quartzcore framework
Swift
0 vote132 views1 answer
Swift pass any closer to the function
Swift
0 vote132 views1 answer
Swift out of bound elelemnt
Swift
0 vote161 views1 answer
UINavigationBar turns black
Swift
-1 vote107 views1 answer
Get index from array swift
Swift