how to search substring from mutable array?

NSMutableArrray names having string values,

searchText is a substring to search from name array values.

for (NSString *sTemp in names)
    {
        NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch];
        //NSLog(@"sTemp = %@, searchText = %@",sTemp,searchText);
        NSLog(@"%@",titleResultsRange.length);
        if (titleResultsRange.length > 0)
            [Items addObject:sTemp];
    }