nspredicate

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How to sort NSPredicate

I am trying to sort my array while using NSPredicate.. I have read other places that possibly using NSSortDescriptor could be an option. Having some trouble figuring this out.[详细]

2023-03-26 03:52 分类：问答
Core-Data predicate filtering for floats

Basically, I have a database of locations for an MKMapView, and when the detail disclosure button on each annotation is开发者_开发技巧 tapped, it brings up more information on the location, for exampl[详细]

2023-03-25 04:37 分类：问答
NSPredicate something equivalent of SQL's GROUP BY

To simplify: There are 3 columns in a table named cards. id packTitle term id is a column - integers from 0.....100[详细]

2023-03-23 17:20 分类：问答
Trouble with negating Core Data NSPredicate relationships

I\'m scratching my head on this one. I have a work around, but I don\'t understand it so that doesn\'t count. What I want to do is for the entity (in this case a开发者_如何转开发 \"Photo\" lets say),[详细]

2023-03-23 12:42 分类：问答
Count entity in Core Data with a specific Value

I have an Entity with some Attribute. I have my tabes already populates(SQLite table) In one Attribute (i\'ll call Attribute1) i have a bool value, changing during use of my app.[详细]

2023-03-22 00:44 分类：问答
Core Data: Get Objects with the highest value in each category

I am currently struggling with my implementation of core data to get a \"best of each category\" effect - I have already tried to figure out a solution quite a long time now and I just don\'t get find[详细]

2023-03-18 14:25 分类：问答
Fetching data from CoreData with multiple Entities

I have a data model that has 2 entities Person and Photo, they have have Attributes named name how can I be sure when using a NSPredicate that I will fetch or evaluate information from the correct ent[详细]

2023-03-18 07:49 分类：问答
NSPredicate, with quotes / without quotes

In my iPhone app, I\'m reading a csv file. The relevant line is this: NSString *countrycode = [[[NSString alloc] initWithFormat:@\"%@\", [arr objectAtIndex:2]][详细]

2023-03-18 05:04 分类：问答
Core Data: Predicate that Returns Objects of Another Entity

I开发者_运维百科 have two entities in my data model: Details and Lookup. I need find all Details objects related to a specific Lookup object that has specific attribute value and then return those Det[详细]

2023-03-18 03:27 分类：问答
Order by Random() clause in iphone NSPredicate

Hi, I am working on an iphone app, and I have to fetch out data from sqlite table with the help of core data NSPredicate object.[详细]

2023-03-17 12:51 分类：问答