如何获取位标志谓词

Question

typedef NS_OPTIONS(NSUInteger, ListOption) {
ListOption1 = 1 << 0,
ListOption2 = 1 << 1,
ListOption3 = 1 << 2
};

@interface SomeClass : NSManagedObject
@property (nonatomic, retain) NSNumber *listOption;
@end

我将位标志保存到coredata。如何使fetch谓词像＃34; SomeClass.listOption | ListOption1＆＃34;或者＆＃34; SomeClass.listOption＆amp; ListOption1＆＃34;

Answer 1

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"((listOption & %llu)>0)", ListOption1];