当我想在地图视图中搜索核心数据时，目标无法搜索数据，请帮助我收到此错误
2014-02-21 09:43:31.268 naveen[674:a0b] -[Search copyWithZone:]: unrecognized selector sent to instance 0x9a48100
2014-02-21 09:43:31.273 naveen[674:a0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Search copyWithZone:]: unrecognized selector sent to instance 0x9a48100'
当要打印该字符串时，目标是输出为
<Search: 0x9a48100> (entity: Search; id: 0x9a2d070 <x-coredata://2A0FA356-68F2-43DE-A8DE-DCE8DE44145A/Search/p1> ; data: {
text = pub;
})