func webPlugInDestroy ()Prepares the plug-in for deallocation.
func webPlugInStart ()Tells the plug-in to start normal operation.
func webPlugInStop ()Tells the plug-in to stop normal operation.
Discussion 解説
Tells the plug-in to perform one-time initialization. This method must be called only once per instance of the plug-in object, before any other methods in the protocol are called.