Multiple Search in NSString

NSString *labelText = @"Choose a topic from the left to find answers for your questions about iPhone. For the latest downloads, manuals, and other resources for iPhone, choose an option below.";
NSLog(@"Label Text:--->%@",labelText);

So my issue is that I want to search iPhone text wherever is display in above nsstring and also get position if possible so please give me any idea or any开发者_运维百科 link to develop this functionality.

Take it here: (NSLog will print indexes of your substring positions in source string)

- (void)findAllLocationsOfString:(NSString *)substring sourceString:(NSString *)source
{
    NSRange searchRange = NSMakeRange(0, [source length]);
    NSRange place = NSMakeRange(0, 0);
    while (searchRange.location < [source length])
    {
        place = [source rangeOfString:substring options:NSLiteralSearch range:searchRange];
        if (place.location != NSNotFound) NSLog(@"found here : %d", place.location);
        searchRange.location = place.location + place.length;
        searchRange.length = [source length] - searchRange.location;
    }
}