Getting digits from an NSString

Question

I have a string like @"(256) 435-8115" or @"256-435-81-15". I need only the digits (this is a phone number). Is this possible? I haven't found an NSString method to do that.

take a look at NSRegularExpression: https://developer.apple.com/library/mac/#documentation/Foundation/Reference/NSRegularExpression_Class/Reference/Reference.html — CarlJ, May 11 '12 at 09:14
Duplicate of http://stackoverflow.com/questions/1129521/remove-all-but-numbers-from-nsstring — Parag Bafna, May 11 '12 at 09:34

score 6 · Accepted Answer · answered May 11 '12 at 09:35

6

I think there is much simpler way:

-(NSString*)getNumbersFromString:(NSString*)String{
    NSArray* Array = [String componentsSeparatedByCharactersInSet:
                      [[NSCharacterSet decimalDigitCharacterSet] invertedSet]];
    NSString* returnString = [Array componentsJoinedByString:@""];

    return (returnString);

}

answered May 11 '12 at 09:35

Mehdzor

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I think this is the best solution! – Stas May 11 '12 at 11:44

score 1 · Answer 2 · answered May 11 '12 at 09:57

Input:

NSString *stringWithPhoneNumber=@"(256) 435-8115";



NSArray *plainNumbersArray= 

[stringWithPhoneNumber componentsSeparatedByCharactersInSet:

[[NSCharacterSet decimalDigitCharacterSet]invertedSet]];



NSString *plainNumbers = [plainNumbersArray componentsJoinedByString:@""];


NSLog(@"plain number is : %@",plainNumbers);

OutPut: plain number is : 2564358115

score 0 · Answer 3 · answered May 11 '12 at 09:20

0

You can use stringByReplacingOccurrencesOfString: withString: to remove characters you don't want such as @"(" with @""

answered May 11 '12 at 09:20

Ravi Kumar Karunanithi

2,151
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Getting digits from an NSString

3 Answers3