newScriptingObject(of:forValueForKey:withContentsValue:properties:)
Creates and returns an instance of a scriptable class, setting its contents and properties, for insertion into the relationship identified by the key.
Declaration
func newScriptingObject(of objectClass: AnyClass, forValueForKey key: String, withContentsValue contentsValue: Any?, properties: [String : Any]) -> Any?Parameters
- objectClass:
The class of the scriptable object to be created.
- key:
A key that identifies the relationship into which the new class object will be inserted.
- contentsValue:
Specifies the contents of the object to be created. This may be
nil. (See also the Discussion section.) - properties:
The properties to be set in the new object. (See also the Discussion section.)
Return Value
The new object. Returns nil if an error occurs.
Discussion
You can override the newScriptingObjectOfClass method to take more control when your application is sent a make command. This method is invoked on the prospective container of the new object. The contentsValue and properties are derived from the with contents and with properties parameters of the make command. The returned objects or objects are then inserted into the container using key-value coding.
When this method is invoked by Cocoa, neither the contents value nor the properties will have yet been coerced using the NSScriptKeyValueCoding method coerceValue(_:forKey:). For sdef-declared scriptability, however, the types of the passed-in objects reliably match the relevant sdef declarations.
The default implementation of this method creates new scripting objects by sending alloc to a class and init to the resulting object. You override this method for situations where this is not sufficient, such as in Core Data applications, in which new objects must be initialized with [NSManagedObject initWithEntity:insertIntoManagedObjectContext:].