如何使用该受管对象的date属性对NSFetchRequest进行排序.那么它创建一个数组,其日期顺序？
这是我的代码到目前为止
@H_502_3@var request : NSFetchRequest = NSFetchRequest(entityName: "History"); request.predicate = NSPredicate(format: "counts = %@",true) request.sortDescriptors = [???] <- What should I put here? var results : [NSManagedObject] = context.executeFetchRequest(request,error: nil) as [NSManagedObject]