Core Data中是否有类似sql“NOT IN”的功能？

Question

SQL 命令

从 GAMELOCALTEAM 不在“TBC”顺序中的游戏中选择 GAMELOCALTEAM 由 GAMELOCALTEAM 提供

我想在objective c 中编写sql 命令。下面是我的文字代码

NSManagedObjectContext * context = ((AFLAppDelegate *)[[UIApplication sharedApplication] delegate] ).managedObjectContext;
NSFetchRequest* fetch = [NSFetchRequest fetchRequestWithEntityName:@“game”];
NSEntityDescription *entity = [NSEntityDescription entityForName:@“game” inManagedObjectContext:context];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"NOT(gamelocalteam IN 'tbc')"];
[fetch setPredicate:predicate];
NSSortDescriptor *sortDescreptor =[[NSSortDescriptor alloc]initWithKey:@"gamelocalteam" ascending:YES];
[fetch setSortDescriptors:[NSArray arrayWithObject:sortDescreptor]];
NSAttributeDescription* attributeDescription = [entity.attributesByName objectForKey:@"gamelocalteam"];
[fetch setPropertiesToFetch:[NSArray arrayWithObjects:attributeDescription, nil]];
[fetch setPropertiesToGroupBy:[NSArray arrayWithObject:attributeDescription]];
[fetch setResultType:NSDictionaryResultType];
NSError *error = nil;
_team = [context executeFetchRequest:fetch error:&error];

如果此通话应用程序崩溃，谓词格式为@"NOT(gamelocalteam IN 'tbc')。

NOT IN可以吗？

Answer 1

试试看

@"NOT gamelocalteam contains[cd] 'tbc'"

下面的代码

NSManagedObjectContext * context = ((AFLAppDelegate *)[[UIApplication sharedApplication] delegate] ).managedObjectContext;
NSFetchRequest* fetch = [NSFetchRequest fetchRequestWithEntityName:@“game”];
NSEntityDescription *entity = [NSEntityDescription entityForName:@“game” inManagedObjectContext:context];
NSPredicate *predicate = [NSPredicate predicateWithFormat:>@"NOT gamelocalteam contains[cd] 'tbc'"];
[fetch setPredicate:predicate];
NSSortDescriptor *sortDescreptor =[[NSSortDescriptor alloc]initWithKey:@"gamelocalteam" ascending:YES];
[fetch setSortDescriptors:[NSArray arrayWithObject:sortDescreptor]];
NSAttributeDescription* attributeDescription = [entity.attributesByName objectForKey:@"gamelocalteam"];
[fetch setPropertiesToFetch:[NSArray arrayWithObjects:attributeDescription, nil]];
[fetch setPropertiesToGroupBy:[NSArray arrayWithObject:attributeDescription]];
[fetch setResultType:NSDictionaryResultType];
NSError *error = nil;
_team = [context executeFetchRequest:fetch error:&error];

Answer 2

您的谓词代码如下所示，

NSPredicate* predicate = [NSPredicate predicateWithFormat:@"NOT (%K CONTAINS[c] %@)",@"someKey", [NSString stringWithFormat:@"Some String"]];

谢谢！