Ios NSPredicate在操作中使用的多对多比较

我正在尝试从核心数据中获取记录。这是一个任务列表<代码>任务实体与

标记

实体有

对多

关系

现在我需要用一些过滤过的

标签

获取

任务

due_date = nil AND status != 2 AND (user_id = 26894 OR owner.id = 26894) AND (title contains[cd] 'shop' OR owner.name contains[cd] 'shop' OR owner.email contains[cd] 'shop' OR note contains[cd] 'shop') AND ANY tags.id IN (
    2021,
    6573,
    6588
)

角色

AND ANY tags.id IN (
        2021,
        6573,
        6588
    )

正在导致应用程序崩溃，出现以下错误

 -[__NSCFNumber countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x163b3500
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x163b3500'

以下是我的完整方法：

+ (NSPredicate *)predicateGetIdeasOffline {
    NSString *predicateString = [NSString stringWithFormat:@"due_date = nil AND status != 2 AND (user_id = %@ OR owner.id = %@)", [DBUsers currentUser].id, [DBUsers currentUser].id];

    if ([MKGlobals tasksSearchFilter].length > 0) {
        NSString *searchTerm = [MKGlobals tasksSearchFilter];
        predicateString = [NSString stringWithFormat:@"%@ AND (title contains[cd] '%@' OR owner.name contains[cd] '%@' OR owner.email contains[cd] '%@' OR note contains[cd] '%@')", predicateString, searchTerm, searchTerm, searchTerm, searchTerm];
    }

    if ([MKGlobals tagsList].count > 0) {
        predicateString = [NSString stringWithFormat:@"%@ AND ANY tags.id IN %@", predicateString, [MKGlobals tagsListIDs]];
    }
    return [NSPredicate predicateWithFormat:predicateString];
}

---

如何创建这样的

NSPredicate

我也有同样的问题，只是因为我使用了

NSSet

并调用了

[NSPredicate predicateWithFormat:@“ID IN%@，[set allObjects]”。对我有效的方法是在调用谓词函数之前将NSSet完全更改为NSArray
 您确定[MKGlobals tagsListIDs]正在返回数组吗？当然，您可以查看NSLog（问题2021、6573、6588）