当我使用Predicate过滤一组自定义Swift类时，出现错误:***NSForwarding:warning:object0x78ed21a0ofclass'Plantivo1_6.Seed'doesnotimplementmethodSignatureForSelector:--troubleaheadUnrecognizedselector-[Plantivo1_6.SeedvalueForKey:]如果我没记错的话，这在Objective-C中是可行的。我的错误是什么？letnames=["Tom","Mike","Marc"]println(names)letsearchP