NSCompoundPredicate不适用于多个谓词

Question

以下是我的谓词：

1) category.enabled == 1 AND (author CONTAINS[c] "John" OR city CONTAINS[c] "John" OR state CONTAINS[c] "John")

2) category.enabled == 1 AND (author CONTAINS[c] "dallas" OR city CONTAINS[c] "dallas" OR state CONTAINS[c] "dallas")

3) category.enabled == 1 AND ((author CONTAINS[c] "John" OR city CONTAINS[c] "John" OR state CONTAINS[c] "John") OR (author CONTAINS[c] "dallas" OR city CONTAINS[c] "dallas" OR state CONTAINS[c] "dallas"))

以下是代码的构造方式：

-(void)findString:(NSString *)string {
    
    if (!string) {
        string = @"";
    }
    NSMutableArray *predicatesArray = [NSMutableArray array];
    NSArray *searchQueriesArray = [string componentsSeparatedByString:@" "];
    NSPredicate *categoryPredicate = [NSPredicate predicateWithFormat:@"category.enabled == %@",[NSNumber numberWithBool:YES]];
    for(NSString *query in searchQueriesArray){
        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"author CONTAINS[cd] %@ OR city CONTAINS[cd] %@ OR state CONTAINS[cd] %@", query, query, query];
        [predicatesArray addObject:predicate];
    }
    NSPredicate *fieldsSearchPredicate = [NSCompoundPredicate orPredicateWithSubpredicates:predicatesArray];
    NSArray *searchPredicatesArray = [NSArray arrayWithObjects:categoryPredicate,fieldsSearchPredicate, nil];
    NSPredicate *searchPredicate = [NSCompoundPredicate andPredicateWithSubpredicates:searchPredicatesArray];
    self.tracks = [Track findAllSortedBy:@"name" ascending:YES withPredicate:searchPredicate];
    
    [self.tableView reloadData];
}

1）谓词是用string = "John";构造的 2）with string = "dallas"; 3）与string = "John dallas"

问题是：用1）搜索或用2）谓词返回结果，但用3）不返回任何结果。