NSString scanning?

i am having NSString* str = @"1223.2212311"; i want to convert it 开发者_JAVA技巧as 1223.22(after floating point two chars),is it possible through NSString?i have to use NSScanner? any help please?

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How about something like:

NSString* str = @"1223.2212311";
NSString* result = [NSString stringWithFormat:@"%.2f", [str floatValue]];

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You should take a look at NSNumberFormatter.

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If the strings aren't going to be localized, you can just use -[NSString floatValue] to parse them.