我想在创建用户时将个人资料照片添加到用户收藏中。我正在考虑做[usersetValue:imageDataforAttribute:@"photo"]然后在KCSLinkedAppdataStore的帮助下存储它。但它失败并显示错误NSConcreteMutableData不支持JSON序列化。[usersetValue:imageDataforAttribute:@"photo"];KCSLinkedAppdataStore*store=[KCSLinkedAppdataStorestoreWithCollection:[KCSCollectionuserCollection]opt

我有一个数据库，其中有一列包含一个字符串数组。示例表:name|words|...Ash|["Apple","Pear","Plum"]|...Joe|["Walnut","Peanut"]|...Max|["Pineapple","Apple","Plum"]|...现在我想将此表与给定的单词数组进行匹配，并按匹配率对文档进行分组。具有预期结果的示例输入://matchedforinput=["Walnut","Peanut","Apple"]{"1.00":[{name:"Joe",match:"1.00"}],"0.33":[{name:"Ash",match:"0.33"},{

按照我创建对象的文档中的说明，我填充它们的属性并将链接保存在数据存储中:publicclassInvitationEntityextendsGenericJson{@KeypublicStringobjectId;@Keypublicintstatus;@Key("_id")publicStringid;@KeypublicStringname;}publicclassEventEntityextendsGenericJson{@KeypublicStringname;@KeypublicStringeventDate;@KeypublicStringlocation;@Keypubl