Character occurrences in a String Objective C

Question

How can I count the occurrence of a character in a string?

Example

String: 123-456-7890

I want to find the occurrence count of \"-\

Answer 1

int num = [[[myString mutableCopy] autorelease] replaceOccurrencesOfString:@"-" withString:@"X" options:NSLiteralSearch range:NSMakeRange(0, [myString length])];

The replaceOccurrencesOfString:withString:options:range: method returns the number of replacements that were made, so we can use that to work out how many -s are in your string.