NSPredicate的AND和OR问题

Question

NSPredicate语句：

fetchRequest.predicate = [NSPredicate predicateWithFormat:@"url = %@ AND type = %@ OR type = %@", newsStory.url, [NSNumber numberWithInt:StoryHighlighted], [NSNumber numberWithInt:StorySavedAndHighlighted]];

实现的是通过指定URL获取story并且标记（高亮），但是查询结果不正常。不知道该怎么实现？

Answer 1

fetchRequest.predicate = [NSPredicate predicateWithFormat:@"url = %@ AND (type = %@ OR type = %@)", newsStory.url, [NSNumber numberWithInt:StoryHighlighted], [NSNumber numberWithInt:StorySavedAndHighlighted]];

应该可以用。用用试试吧