NSPredicate 和 NSString 问题

发布于 2024-11-29 11:27:49 字数 1207 浏览 8 评论 0原文

我有以下谓词，可以很好地处理 555 和 623（3 位数字）等数字。

问题是，我有 005 和 009 等数字（1 位数字，前面有两个 0）。

NSPredicate *filterPredicate = [NSPredicate predicateWithFormat:@"ANY code BETWEEN %@",
                                    [NSArray arrayWithObjects: 
                                     [NSExpression expressionForConstantValue: [NSNumber numberWithFloat: [self.predicateFilter floatValue]]],
                                     [NSExpression expressionForConstantValue: [NSNumber numberWithFloat: [self.predicateFilter floatValue] + .99]],
                                     nil]];

大多数时候，predicateFilter 是一个带有数字的字符串，如 @"124"。但是，当我运行像 035 这样的数字（注意开头的 0）时，我得到以下 NSLog：

2011-08-13 18:32:23.989 Codes[2007:707] code 004
2011-08-13 18:32:24.018 Codes[2007:707] ANY code BETWEEN {4, 4.99}
2011-08-13 18:34:23.846 Codes[2007:707] code 083
2011-08-13 18:34:23.864 Codes[2007:707] ANY code BETWEEN {83, 83.99}

因此，由于 00X，它找不到这些数字。

有没有办法可以执行 if/else 或捕获所有以 0 或 00 开头的数字，以便我可以相应地编辑谓词？

编辑：

我想我只需要创建一个谓词，将 code 的前 3 位数字与 NSString 匹配，即 005。然后这会给我其余的结果，即 005.5、005.6、 ETC。

原文

I have the following predicate that works fine with numbers such as 555 and 623 (3 digit numbers)

The problem is, I have numbers such as 005 and 009 etc (1 digit with two 0 before).

NSPredicate *filterPredicate = [NSPredicate predicateWithFormat:@"ANY code BETWEEN %@",
                                    [NSArray arrayWithObjects: 
                                     [NSExpression expressionForConstantValue: [NSNumber numberWithFloat: [self.predicateFilter floatValue]]],
                                     [NSExpression expressionForConstantValue: [NSNumber numberWithFloat: [self.predicateFilter floatValue] + .99]],
                                     nil]];

Most of the time, predicateFilter will be a string with number like @"124". But when I run a number like 035 (notice the 0 at beggining), I get the following NSLog:

2011-08-13 18:32:23.989 Codes[2007:707] code 004
2011-08-13 18:32:24.018 Codes[2007:707] ANY code BETWEEN {4, 4.99}
2011-08-13 18:34:23.846 Codes[2007:707] code 083
2011-08-13 18:34:23.864 Codes[2007:707] ANY code BETWEEN {83, 83.99}

So it is not finding those numbers because of the 00X.

Is there a way I can do an if/else or something that catches all numbers that have a 0 or 00 to begin with, so I can edit the predicate accordingly?

EDIT:

I think I just need to make a predicate that matches the first 3 digits of code to an NSString, which as 005. Then that would give me the rest of the results that are 005.5, 005.6, etc.

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