使用NSPredicate匹配整数列表

Question

我有一个带整数字段的表.我想选择该字段包含任意几个不同值的所有行.

我正在使用这个:

[NSPredicate predicateWithFormat:@"myIntValue IN {1,2,3,4}"]

但这只返回myIntValue1的行.

我究竟做错了什么？

Answer 1

这有效:

NSFetchRequest *request = [[NSFetchRequest alloc] init];

NSArray *idList = [NSArray arrayWithObjects:[NSNumber numberWithInt:1],
                                            [NSNumber numberWithInt:2],
                                            [NSNumber numberWithInt:3],
                                            [NSNumber numberWithInt:4],
                                            nil];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"idealForId IN $IDLIST"];
request.predicate = [predicate predicateWithSubstitutionVariables:
    [NSDictionary dictionaryWithObject:idList forKey:@"IDLIST"]];