我的应用被拒绝了，因为我将应用内购买数据保存在iPhone的文档文件夹中。Datathatcanberecreatedbutmustpersistforproperfunctioningofyourapp-orbecausecustomersexpectittobeavailableforofflineuse-shouldbemarkedwiththe"donotbackup"attribute.ForNSURLobjects,addtheNSURLIsExcludedFromBackupKeyattributetopreventthecorrespondingfilefrombein