Contents

validateValue(_:forKeyPath:)

Indicates whether the value specified by a given pointer is not valid for a given key path relative to the receiver.

Declaration

func validateValue(_ ioValue: AutoreleasingUnsafeMutablePointer<AnyObject?>, forKeyPath inKeyPath: String) throws

Parameters

  • ioValue:

    A pointer to a new value for the property identified by inKeyPath. This method may modify or replace the value in order to make it valid.

  • inKeyPath:

    The name of one of the receiver’s properties. The key path must specify an attribute or a to-one relationship. The key path has the form relationship``.``property (with one or more relationships); for example department.name or department.manager.lastName.

Discussion

In Swift, this method throws an error if the value isn’t valid. In Objective-C, it returns a Boolean value.

The default implementation of this method gets the destination object for each relationship using value(forKey:) and returns the result of calling the validateValue(_:forKey:) method for the property.

See Also

Validation