ios - CoreData NSPredicate 按日期获取数据

Question

请帮我做这个谓词

[NSPredicate predicateWithFormat:[NSString stringWithFormat:@"subsidiary_of_cat_id == %@ AND (valid_from < %@) AND (valid_till > %@ OR valid_till == %@) ",catId,[NSDate date],[NSDate date], dateTo,]]

收到崩溃错误:无法解析格式字符串

从CoreData中获取数据的条件

条件一:now() < valid_till OR now() = [NSDate date]
条件二:now() > valid_from

谢谢!

已解决:更新代码

NSMutableArray *predicatesArray = [NSMutableArray array];
    [predicatesArray addObject:[NSPredicate predicateWithFormat:@"%@ == subsidiary_of_cat_id",catId]];
    [predicatesArray addObject:[NSPredicate predicateWithFormat:@"%@ > valid_from",[NSDate date]]];
    [predicatesArray addObject:[NSPredicate predicateWithFormat:@"%@ < valid_till",[NSDate date]]];
    [predicatesArray addObject:[NSPredicate predicateWithFormat:@"%@ == valid_till”,dateTo];
[NSCompoundPredicate orPredicateWithSubpredicates:predicatesArray]

Answer 1

您不需要将字符串包装在 stringWithFormat 中:

[NSPredicate predicateWithFormat:@"subsidiary_of_cat_id == %@ AND (valid_from < %@) AND (valid_till > %@ OR valid_till == %@) ",catId,[NSDate date],[NSDate date], dateTo];