Question

请帮我制作这个谓词

[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获取数据的条件

条件1：now（）＆lt; valid_till或now（）= [NSDate date]
条件2：now（）＆gt; VALID_FROM

谢谢！

已解决：更新了代码

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

您无需将字符串包装在stringWithFormat：

中

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

CoreData NSPredicate按日期获取数据

1 个答案: