- iOS 8.0+
- macOS 10.10+
The web view invoking the delegate method.
The message to be displayed.
The initial text to display in the text entry field.
The completion handler to call after the text input panel has been dismissed. Pass the entered text if the user chose OK, otherwise
For user security, implementations of this method should call attention to the fact that a specific website controls the content in this panel. A simple formula for identifying the controlling website is
frame. The panel should have two buttons (typically OK and Cancel) and a field in which to enter text.