Email Address Validation

//returns YES if checked string is email formatted, or NO

-(BOOL) validateEmail:(NSString*) string {

NSString*emailRegex =@"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

NSPredicate*emailTest =[NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

return[emailTest evaluateWithObject:string];

}