Function 関数

objc_getClass(_:)

Returns the class definition of a specified class.

Declaration 宣言 

func objc_getClass(_ name: UnsafePointer<CChar>) -> Any!

Parameters パラメータ

name

The name of the class to look up.

Return Value 戻り値

The Class object for the named class, or nil if the class is not registered with the Objective-C runtime.

Discussion 解説

objc_getClass is different from objc_lookUpClass(_:) in that if the class is not registered, objc_getClass calls the class handler callback and then checks a second time to see whether the class is registered. objc_lookUpClass(_:) does not call the class handler callback.

Special Considerations 特別な注意事項

Earlier implementations of this function (prior to OS X v10.0) terminate the program if the class does not exist.

See Also 参照

Obtaining Class Definitions

func objc_getClassList(AutoreleasingUnsafeMutablePointer<AnyClass>?, Int32) -> Int32
Obtains the list of registered class definitions.
func objc_copyClassList(UnsafeMutablePointer<UInt32>?) -> AutoreleasingUnsafeMutablePointer<AnyClass>?
Creates and returns a list of pointers to all registered class definitions.
func objc_lookUpClass(UnsafePointer<CChar>) -> AnyClass?
Returns the class definition of a specified class.
func objc_getRequiredClass(UnsafePointer<CChar>) -> AnyClass
Returns the class definition of a specified class.
func objc_getMetaClass(UnsafePointer<CChar>) -> Any!
Returns the metaclass definition of a specified class.