---
title: Objective-C Constants
framework: Objective-C Runtime
role: collectionGroup
role_heading: API Collection
path: objectivec/objective-c-constants
---

# Objective-C Constants

## Topics

### Constants

- [NSIntegerMax](objectivec/nsintegermax.md)
- [NS_ENFORCE_NSOBJECT_DESIGNATED_INITIALIZER](objectivec/ns_enforce_nsobject_designated_initializer.md)
- [OBJC_BOOL_IS_BOOL](objectivec/objc_bool_is_bool.md)
- [OBJC_BOOL_IS_CHAR](objectivec/objc_bool_is_char.md)
- [OBJC_NO_GC_API](objectivec/objc_no_gc_api.md)
- [OBJC_OLD_DISPATCH_PROTOTYPES](objectivec/objc_old_dispatch_prototypes.md)
- [OBJC_ADDLOADIMAGEFUNC_DEFINED](objectivec/objc_addloadimagefunc_defined.md)
- [OBJC_GETCLASSHOOK_DEFINED](objectivec/objc_getclasshook_defined.md)
- [OBJC_REALIZECLASSFROMSWIFT_DEFINED](objectivec/objc_realizeclassfromswift_defined.md)
- [OBJC_SETHOOK_LAZYCLASSNAMER_DEFINED](objectivec/objc_sethook_lazyclassnamer_defined.md)

## See Also

### Reference

- [Objective-C Runtime](objectivec/objective-c-runtime.md)
- [Objective-C Structures](objectivec/objective-c-structures.md)
- [Objective-C Functions](objectivec/objective-c-functions.md)
- [Objective-C Data Types](objectivec/objective-c-data-types.md)
- [Objective-C Macros](objectivec/objective-c-macros.md)
- [Objective-C Enumerations](objectivec/objective-c-enums.md)