不使用NSDataDetector解析来自NSString的地址

Question

我一直在使用NSDataDetector从字符串中解析出地址，大多数情况下它都做得很好。然而，在类似于这个地址的地址上，它没有检测到它。

6200 North Evan Blvd Suit 487 Highland UT 84043

目前，我正在使用以下代码：

NSError *error = nil;
NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeAddress error:&error];


NSArray *matches = [detector matchesInString:output options:0 range:NSMakeRange(0, [output length])];

for (NSTextCheckingResult *match in matches) {
    if ([match resultType] == NSTextCheckingTypeAddress) {

        _address = [_tesseractData substringWithRange:[match range]];
        NSDictionary *data = [match addressComponents];

        _zip = [data objectForKey:@"ZIP"];
        if (_zip) {
            NSRange zipRange = [_tesseractData rangeOfString:_zip];
            if (zipRange.location != NSNotFound) {
                [_tesseractData deleteCharactersInRange:zipRange];
            }
        }

        _city = [data objectForKey:@"City"];
        if (_city) {
            NSRange cityRange = [_tesseractData rangeOfString:[_city uppercaseString]];
            if (cityRange.location != NSNotFound) {
                [_tesseractData deleteCharactersInRange:cityRange];
            }
        }
        _city = [_city capitalizedString];

        _state = [data objectForKey:@"State"];

        _street = [data objectForKey:@"Street"];
        if (_street) {
            NSRange streetRange = [_tesseractData rangeOfString:[_street uppercaseString]];
            if (streetRange.location != NSNotFound) {
                [_tesseractData deleteCharactersInRange:streetRange];
            }
        }
        _street = [_street capitalizedString];

    }
}

有没有人能推荐一种更健壮的方法来从字符串中解析出物理地址？我需要能够得到邮政编码，街道，州和城市。

Answer 1

NSDataDetector是一个NSRegularExpression子类，所以也许你可以创建一个定制的实例，并从检查苹果把什么作为pattern和options参数开始。

大致是这样的：

NSDataDetector * dataDetectorRegEx = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeAddress error:&error];
NSString * dataDetectorPattern = dataDetectorRegEx.pattern;
NSLog(@"Check out this pattern!: %@", dataDetectorPattern);

// Customize the pattern for your special cases
NSString * customPattern = [NSString stringWithFormat:@"<MY_OTHER_PATERNS + %@>", dataDetectorPattern];
NSRegularExpression * customDataDetectorLikeRegEx = [NSRegularExpression regularExpressionWithPattern:customPattern options:someOptions error:&error];

Answer 2

您可以尝试使用正则表达式(RegEx)解析地址信息，我认为这是更健壮的方法。请参阅以下使用RegEx的参考：Making RegEx Easy in Objective-C，Objective-C RegEx Categories可在GitHub上找到。