How to get NSRange(s) for a substring in NSString? [duplicate]

Answer 1

Lots of ways of solving this problem - NSScanner was mentioned; rangeOfString:options:range etc. For completeness' sake, I'll mention NSRegularExpression. This also works:

    NSMutableAttributedString *mutableString = nil;
    NSString *sampleText = @"I live in California, blah blah blah California.";
    mutableString = [[NSMutableAttributedString alloc] initWithString:sampleText];

    NSString *pattern = @"(California)";
    NSRegularExpression *expression = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:nil];

    //  enumerate matches
    NSRange range = NSMakeRange(0,[sampleText length]);
    [expression enumerateMatchesInString:sampleText options:0 range:range usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
        NSRange californiaRange = [result rangeAtIndex:0];
        [mutableString addAttribute:NSForegroundColorAttributeName value:[NSColor greenColor] range:californiaRange];
    }];