# Objective-C Constants ## Topics ### Constants [`var NSIntegerMax: Int`](/documentation/ObjectiveC/NSIntegerMax) The maximum value for an `NSInteger`. [`var NS_ENFORCE_NSOBJECT_DESIGNATED_INITIALIZER: Int32`](/documentation/ObjectiveC/NS_ENFORCE_NSOBJECT_DESIGNATED_INITIALIZER) [`extern const NXHashTablePrototype NXPtrPrototype;`](/documentation/ObjectiveC/NXPtrPrototype) [`extern const NXHashTablePrototype NXPtrStructKeyPrototype;`](/documentation/ObjectiveC/NXPtrStructKeyPrototype) [`extern const NXHashTablePrototype NXStrPrototype;`](/documentation/ObjectiveC/NXStrPrototype) [`extern const NXHashTablePrototype NXStrStructKeyPrototype;`](/documentation/ObjectiveC/NXStrStructKeyPrototype) [`var OBJC_BOOL_IS_BOOL: Int32`](/documentation/ObjectiveC/OBJC_BOOL_IS_BOOL) [`var OBJC_BOOL_IS_CHAR: Int32`](/documentation/ObjectiveC/OBJC_BOOL_IS_CHAR) [`var OBJC_NO_GC_API: Int32`](/documentation/ObjectiveC/OBJC_NO_GC_API) [`var OBJC_OLD_DISPATCH_PROTOTYPES: Int32`](/documentation/ObjectiveC/OBJC_OLD_DISPATCH_PROTOTYPES) `OBJC_OLD_DISPATCH_PROTOTYPES == 0` enforces the rule that the dispatch functions must be cast to an appropriate function pointer type. [`var OBJC_ADDLOADIMAGEFUNC_DEFINED: Int32`](/documentation/ObjectiveC/OBJC_ADDLOADIMAGEFUNC_DEFINED) [`var OBJC_GETCLASSHOOK_DEFINED: Int32`](/documentation/ObjectiveC/OBJC_GETCLASSHOOK_DEFINED) [`var OBJC_REALIZECLASSFROMSWIFT_DEFINED: Int32`](/documentation/ObjectiveC/OBJC_REALIZECLASSFROMSWIFT_DEFINED) [`var OBJC_SETHOOK_LAZYCLASSNAMER_DEFINED: Int32`](/documentation/ObjectiveC/OBJC_SETHOOK_LAZYCLASSNAMER_DEFINED) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)