Question

How I can get the position/Index of a substring within an NSString?

I am finding the location in the following way.

NSRange range = [string rangeOfString:searchKeyword];
NSLog (@"match found at index:%u", range.location);

This returns index:2147483647 when searchKeyword is a substring within string.

How i can get the index value like 20 or 5 like that?

Answer 1

2147483647 is the same thing as NSNotFound, which means the string you searched for (searchKeyword) wasn’t found.

NSRange range = [string rangeOfString:searchKeyword];
if (range.location == NSNotFound) {
    NSLog(@"string was not found");
} else {
    NSLog(@"position %lu", (unsigned long)range.location);
}