Function

objc_loadWeak(_:)

Loads the object referenced by a weak pointer and returns it.

Declaration

func objc_loadWeak(_ location: AutoreleasingUnsafeMutablePointer<AnyObject?>) -> Any?

Parameters

location

The address of the weak pointer.

Return Value

The object pointed to by location, or nil if location is nil.

Discussion

This function loads the object referenced by a weak pointer and returns it after retaining and autoreleasing the object. As a result, the object stays alive long enough for the caller to use it. This function is typically used anywhere a __weak variable is used in an expression.

See Also

Using Objective-C Language Features

func objc_enumerationMutation(Any)

Inserted by the compiler when a mutation is detected during a foreach iteration.

func imp_implementationWithBlock(Any) -> IMP

Creates a pointer to a function that calls the specified block when the method is called.

func imp_getBlock(IMP) -> Any?

Returns the block associated with an IMP that was created using imp_implementationWithBlock(_:).

func imp_removeBlock(IMP) -> Bool

Disassociates a block from an IMP that was created using imp_implementationWithBlock(_:), and releases the copy of the block that was created.

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