[GitHub] [cordova-ios] idoodler commented on issue #417: Keyboard Dismissal Leaves Viewport Shifted in iOS 12 / XCode 10

[GitBox <gi...@apache.org>]

idoodler commented on issue #417: Keyboard Dismissal Leaves Viewport Shifted in iOS 12 / XCode 10
URL: https://github.com/apache/cordova-ios/issues/417#issuecomment-479130967
 
 
   @tobeee I placed the code in an extension of `MainViewController` I attached the file below.
   
   ```
   import Foundation
   import WebKit
   
   extension MainViewController {
       
       override open func viewDidLoad() {
           super.viewDidLoad()
           /**
            * observer notification when keyboard will hide
            */
           NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name:UIResponder.keyboardWillHideNotification, object: nil)
       }
   
       
       // There is a bug in WebKit that won't reset the contentOffset after the keyboard has been hidden. This would
       // result in a black (former white) space where the keyboard was located. By manually moving down the content of the
       // scrollView we work around that issue and everything works as usual
       @objc fileprivate func keyboardWillHide() {
           if #available(iOS 12, *) {
               webView.subviews.forEach { (subview) in
                   if let scrollView = subview as? UIScrollView {
                       scrollView.setContentOffset(CGPoint(x: 0, y: 0), animated: true)
                   }
               }
           }
       }
   }
   ```

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