想打印hook到的参数

@a906335708 wrote:

hook了自己写的app的 didSelectRowAtIndexPath 方法，打印indexpath

%hook MessageChatListViewController

• (void)tableView:(id)arg1 didSelectRowAtIndexPath:(id)arg2{
  Ivar indexPathIvar = class_getInstanceVariable([arg2 class], “indexPath”);
  id indexPath= object_getIvar(arg2, indexPathIvar);
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@“didSelectRowAtIndexPath” message:[NSString stringWithFormat:@“indexpath.row = %ld”,[indexPath row]] delegate:self cancelButtonTitle:@“OK” otherButtonTitles:nil];
  [alert show];

//%orig;
}
%end

但是点击cell后 能hook这方法 但是每次打印出来都是null，
Ivar indexPathIvar = class_getInstanceVariable([arg2 class], “indexPath”);
id indexPath= object_getIvar(arg2, indexPathIvar);
这个方法用的有问题么？

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