Instance Method

setNilValueForKey(_:)

Invoked by setValue(_:forKey:) when it’s given a nil value for a scalar value (such as an int or float).

Declaration

func setNilValueForKey(_ key: String)

Parameters

key

The name of one of the receiver's properties.

Discussion

Subclasses can override this method to handle the request in some other way, such as by substituting 0 or a sentinel value for nil and invoking setValue(_:forKey:) again or setting the variable directly. The default implementation raises an NSInvalidArgumentException.

See Also

Setting Values

func setValue(Any?, forKeyPath: String)

Sets the value for the property identified by a given key path to a given value.

func setValuesForKeys([String : Any])

Sets properties of the receiver with values from a given dictionary, using its keys to identify the properties.

func setValue(Any?, forKey: String)

Sets the property of the receiver specified by a given key to a given value.

func setValue(Any?, forUndefinedKey: String)

Invoked by setValue(_:forKey:) when it finds no property for a given key.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software