Instance Method インスタンスメソッド

value(forKeyPath:)

Returns the value for the derived property identified by a given key path.

Declaration 宣言 

func value(forKeyPath keyPath: String) -> Any?

Parameters パラメータ

keyPath

A key path of the form relationship.property (with one or more relationships); for example “department.name” or “department.manager.lastName”.

Return Value 戻り値

The value for the derived property identified by keyPath.

Discussion 解説

The default implementation gets the destination object for each relationship using value(forKey:) and returns the result of a value(forKey:) message to the final object.

See Also 参照

Getting Values 値を取得する

func value(forKey: String) -> Any?
Returns the value for the property identified by a given key.
func dictionaryWithValues(forKeys: [String]) -> [String : Any]
Returns a dictionary containing the property values identified by each of the keys in a given array.
func value(forUndefinedKey: String) -> Any?
Invoked by value(forKey:) when it finds no property corresponding to a given key.
func mutableArrayValue(forKey: String) -> NSMutableArray
Returns a mutable array proxy that provides read-write access to an ordered to-many relationship specified by a given key.
func mutableArrayValue(forKeyPath: String) -> NSMutableArray
Returns a mutable array that provides read-write access to the ordered to-many relationship specified by a given key path.
func mutableSetValue(forKey: String) -> NSMutableSet
Returns a mutable set proxy that provides read-write access to the unordered to-many relationship specified by a given key.
func mutableSetValue(forKeyPath: String) -> NSMutableSet
Returns a mutable set that provides read-write access to the unordered to-many relationship specified by a given key path.
func mutableOrderedSetValue(forKey: String) -> NSMutableOrderedSet
Returns a mutable ordered set that provides read-write access to the uniquing ordered to-many relationship specified by a given key.
func mutableOrderedSetValue(forKeyPath: String) -> NSMutableOrderedSet
Returns a mutable ordered set that provides read-write access to the uniquing ordered to-many relationship specified by a given key path.

Related Documentation 関連文書

func setValue(Any?, forKeyPath: String)
Sets the value for the property identified by a given key path to a given value.