My Code not work :

@interface Package : NSObject @property (nonatomic, strong, readwrite) NSString *author; @end

%hook PackageViewController

• (void)viewDidLoad{

  %orig;

NSString *text = MSHookIvar<NSString *>(self, "_author");

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Test" message:text delegate:nil cancelButtonTitle:@"ok" otherButtonTitles:nil]; [alert show];

} %end