Wildcards in strings

I'm interested in using rangeOfString with some wildcard characters as part of a search string.

For example, if I have several strings like "244px" and "356px" and I want to convert all such strings to "320px". Is开发者_JS百科 there a way I can use wildcards to get the desired result?

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If you could use regex, you can do substitution for this pattern "[1-9][0-9]+px" to "320px"

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RegexKitLite is what you want, it has a small NSString extenstion class that lets you use the built-in regex libraries easily.

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Use NSNumberFormatter configured to the right pattern.