@interface NSValue (NSDeprecated) /* This method is unsafe because it could potentially cause buffer overruns. You should use -getValue:size: instead. */ - (void)getValue:(void *)value; // This method will likely be deprecated in a future release @end

https://developer.apple.com/documentation/foundation/nsvalue/1415141-getvalue?language=objc 見てみるとこっこうあるもんですね。