NSString Character found

I have on n开发者_StackOverflowsstring object in which sometimes phone number gets stored and sometimes email address, i just need to ask that how to find any character suppose @ in a string, when email address is typed.

This is how you could check for @ as a substring

if ([string rangeOfString:@"@"].location == NSNotFound) {
  // Number
} else {
  // Email
}