不区分大小写的NSPredicate在CoreData中具有单个结果 [英] case insensitive NSPredicate with single result in CoreData

问题描述

这是我当前的NSPredicate:

  NSPredicate * predicate = [NSPredicate predicateWithFormat:@"UPC ==％@或ItemID ==％@"，aUPCCode，aUPCCode]； 

如何使这种情况不区分大小写?

我不想做任何部分匹配.

例如，如果他们为aUPCCode输入123，我不想获取123、123a，123b，123c等.我只想要完全匹配.

我考虑过要这样做，但这似乎有点荒谬:

  NSPredicate * predicate = [NSPredicate predicateWithFormat:@"UPC ==％@或ItemID ==％@或UPC ==％@或ItemID ==％@或UPC ==％@或ItemID ==％@，aUPCCode，aUPCCode，[aUPCCode lowercaseString]，[aUPCCode lowercaseString]，[aUPCCode uppercaseString]，[aUPCCode uppercaseString]]; 

解决方案

正如Dave DeLong所说，您可以使用:

  NSPredicate * predicate = [NSPredicate predicateWithFormat:@"UPC == [c]％@或ItemID == [c]％@"，aUPCCode，aUPCCode]； 

修改:

使用 == [c] 代替 == [cd] ，否则也会得到重音符号( abcd ==àbcd)./p>

Here is my current NSPredicate:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"UPC==%@ OR ItemID==%@", aUPCCode,aUPCCode];

How can I make this case insensitive?

And I do not want to do any partial matching.

Example if they enter 123 for aUPCCode I do not want to get 123, 123a, 123b, 123c, ect. I would only want an exact match.

I thought about doing this but it seems a little ridiculous:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"UPC==%@ OR ItemID==%@ OR UPC==%@ OR ItemID==%@ OR UPC==%@ OR ItemID==%@", aUPCCode,aUPCCode,[ aUPCCode lowercaseString] ,[aUPCCode lowercaseString], [aUPCCode uppercaseString],[aUPCCode uppercaseString]];

解决方案

As Dave DeLong said, you can use:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"UPC ==[c] %@ OR ItemID ==[c] %@", aUPCCode,aUPCCode];

Edit:

Use ==[c] instead of ==[cd] or you get accents too (abcd == àbcd).

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