Headers included with Theos for easy compilation of most projects out of the box.

Please send us headers you’ve put together that would be useful to the wider community. Be aware that we are looking for “clean” headers, not generated output from class-dump or a similar tool.

• Create headers only for what you use.

• Follow the existing coding style.

  • Objective-C properties should be in the style of @property (attributes) type name;
  • Objective-C methods should be in the style of - (type)methodName:(type)variableName parameter:(type)name;
  • Objective-C generics should be in the style of NSDictionary <NSString *, NSArray <NSObject *> *> *variable

• C functions and variables (all symbols) should be declared using FOUNDATION_EXPORT

  #import <Foundation/Foundation.h>
  
  FOUNDATION_EXPORT int ExternalVariable;
  FOUNDATION_EXPORT const int ExternalConstant;
  FOUNDATION_EXPORT void ExternalFunction(int param);

• Initialisers and singleton (e.g. sharedInstance) methods should return instancetype.

• Don't just copy and paste lines from class-dumps - replace id with the appropriate class. Also change arg1 and the like, or in some cases class-dump-z’s guessed argument names, to something more appropriate. If you don’t know the type, Cycript or FLEX can be helpful:

  $ cycript -p SpringBoard
  cy# [SBBaconController sharedInstance].baconCurrentlyBeingEaten.class
  @"SBBacon"

  Additionally, ensure the appropriate types are used. The most common ones are:

  • float and double should usually become CGFloat or NSTimeInterval
  • int and long should usually become NSInteger
  • unsigned int and unsigned long should usually become NSUInteger

  This is especially important when using the headers as reference for hooking. An incorrect Objective-C type encoding can cause problems.

• Import all relevant public SDK headers for types used in the header. This usually means using #import <Foundation/Foundation.h> or #import <UIKit/UIKit.h>. For private types, prefer to use @class and @protocol. If not possible, for instance for subclassing and protocol conformance, import the private header defining the type.

• For compatibility, prefer classic imports for modules:

  // Do:
  #import <Foundation/Foundation.h>
  #import <objc/runtime.h>
  
  // Don’t:
  @import Foundation;
  @import ObjectiveC.runtime;

  If modules are supported by the compiler, #import of headers from a module will be translated to equivalent @import statements.

• Any headers under an OSI-approved license can be included here. Please add its license to LICENSE.md.

  • That being said, please try to avoid including headers that are vended by their respective authors in separate, cross-platform "dev" packages (e.g., openssl, libarchive, etc)