Microsoft Word - iOSAppReverseEngineering.docx

NSLog(@"This class & method only exist in iOS 7.");

return result;

}

%end

%end // iOS7Hook

%group iOS8Hook

%hook iOS8Class

• (id)iOS8Method
  {
  id result = %orig;
  NSLog(@"This class & method only exist in iOS 8.");
  return result;
  }
  %end
  %end // iOS8Hook

%hook SpringBoard

• (void)powerDown
  {
  %orig;
  }
  %end

Inside %group iOS7Hook, it hooks [iOS7Class iOS7Method]; inside %group iOS8Hook, it

hooks [iOS8Class iOS8Method]; and inside % group _ungrouped, it hooks [SpringBoard

powerDown]. Can you get it?

Notice, %group will only work with %init.

² %init

This directive is used for %group initialization; it must be called inside %hook or %ctor. If a

group name is specified, it will initialize %group SpecifiedGroupName, or it will initialize

%group _ungrouped, for example:

#ifndef kCFCoreFoundationVersionNumber_iOS_8_0

#define kCFCoreFoundationVersionNumber_iOS_8_0 1140.10

#endif

%hook SpringBoard

• (void)applicationDidFinishLaunching:(id)application
  {
  %orig;

%init; // Equals to %init(_ungrouped)

if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_7_0 &&

kCFCoreFoundationVersionNumber <

kCFCoreFoundationVersionNumber_iOS_8_0) %init(iOS7Hook);

if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_8_0)

init(iOS8Hook);

}

%end

Please remember, a %group will only take effect with a corresponding %init.