NSScannerを使用できます。
をスキャンする'
と、文字列が開始されたことを認識し,
、次の を読み取るまで無視します'
。オープニング'
が読まれなかった場合は,
、
この cocoawithlove の記事が参考になるかもしれません。
早速試作品を作りました。私も NSScanner の専門家ではないため、最適化する必要がある可能性が高い
NSString *htmlString = @"12, 22, 'stringA','', 'stringB, stringC', 2,'stringD'";
NSScanner *scanner = [NSScanner scannerWithString:htmlString];
NSString *apostrophe = @"'"; // scanner needs to detect this
NSString *comma = @","; // scanner needs to detect this
NSCharacterSet *charSet = [NSCharacterSet characterSetWithCharactersInString:[NSString stringWithFormat:@"%@%@", apostrophe, comma]];
BOOL apostropheOpen = NO; // is the scan location inside a single quoted substring?
NSInteger lastCommaIndex = -1; // track last found comma's index
NSMutableArray *array = [NSMutableArray array];
while (![scanner isAtEnd]) {
[scanner scanUpToCharactersFromSet:charSet intoString:NULL];
NSString *charAtlocation = [htmlString substringWithRange:NSMakeRange([scanner scanLocation], 1)];
if ([charAtlocation isEqualToString:apostrophe]){
apostropheOpen = !apostropheOpen;
} else if ([charAtlocation isEqualToString:comma]){
if (!apostropheOpen) {
[array addObject: [scanner.string substringWithRange:NSMakeRange(lastCommaIndex+1, [scanner scanLocation]- lastCommaIndex-1)]];
lastCommaIndex = [scanner scanLocation];
}
}
[scanner setScanLocation:[scanner scanLocation]+1];
} ;
// scanner only dealt with the string until the last comma, probably one more value to handle
if (lastCommaIndex < [scanner scanLocation]){
[array addObject: [scanner.string substringWithRange:NSMakeRange(lastCommaIndex+1, [scanner scanLocation]- lastCommaIndex-1)]];
}
// array contains seperated strings, but with blanks and apostrophes
// we will deal with them now
__block NSMutableArray *resultArray = [NSMutableArray array];
[array enumerateObjectsUsingBlock:^(NSString *obj, NSUInteger idx, BOOL *stop) {
obj = [[obj stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]
stringByTrimmingCharactersInSet:charSet];
if ([obj length] > 0)
[resultArray addObject:obj];
else
[resultArray addObject:@"emptySlotInfo"];
}];
resultArray には以下が含まれます
(
12,
22,
stringA,
emptySlotInfo,
stringB, stringC,
2,
stringD
)