Question about initializers for WKWebView class



For the various solutions given for the bronze challenge, I see an instance of WKWebView created using webView = WKWebView()
In the Xcode documentation I only see one initializer and it is init(frame: configuration:). It is also mentioned there that we can use initWithFrame: method to initialize an instance with the default configuration.

  1. So what is the default for the frame in when we only use WKWebView()?

  2. Am I missing the answer to the first question in the documentation center?

  3. Can we always assume that a class can be initialized with ClassName() (so no arguments)? If not, is there something from the documentation that would inform us otherwise?

Thanks for any help.