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)

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

func imp_getBlock(IMP)

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

func imp_removeBlock(IMP)

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