Question

I’ve searched and searched, and because the “@” symbol is used in strings (ex: @”mystring”) in iOS, I cannot find how to determine whether a string contains it. Once I determine if it contains it, I need to know its location within the string.

NSArray *array_Email_Parts = [str_Email_Address componentsSeparatedByString: @"//@"];

The above doesn’t work. I’ve tried several variations of it. Any suggestions?

Answer 1

This will get the index of the @ symbol.

NSString *email = @"[e-mail]";
NSRange range = [email rangeOfString:@"@"];
if (range.location != NSNotFound) {
    NSLog(@"Location of @ is %i", range.location);
    // Prints "Location of @ is 4"
}

Note that @ is perfectly valid within an NSString, don’t escape it.

NSArray *parts = [email componentsSeparatedByString:@"@"];
if ([parts count] == 2) {
    NSString *user = [parts objectAtIndex:0];   // equal to "user"
    NSString *domain = [parts objectAtIndex:1]; // equal to "example.com"
}