NSDataDetector和NSTextCheckingResult的使用

NSDataDetector是NSRegularExpression的子类，主要用于检测半结构化的数据：日期，地址，电话号码，正则表达式等等。

typedef NS_OPTIONS(uint64_t, NSTextCheckingType) {    // a single type
    NSTextCheckingTypeOrthography           = 1ULL << 0,            // language identification
    NSTextCheckingTypeSpelling              = 1ULL << 1,            // spell checking
    NSTextCheckingTypeGrammar               = 1ULL << 2,            // grammar checking
    NSTextCheckingTypeDate                  = 1ULL << 3,            // date/time detection
    NSTextCheckingTypeAddress               = 1ULL << 4,            // address detection
    NSTextCheckingTypeLink                  = 1ULL << 5,            // link detection
    NSTextCheckingTypeQuote                 = 1ULL << 6,            // smart quotes
    NSTextCheckingTypeDash                  = 1ULL << 7,            // smart dashes
    NSTextCheckingTypeReplacement           = 1ULL << 8,            // fixed replacements, such as copyright symbol for (c)
    NSTextCheckingTypeCorrection            = 1ULL << 9,            // autocorrection
    NSTextCheckingTypeRegularExpression NS_ENUM_AVAILABLE(10_7, 4_0)  = 1ULL << 10,           // regular expression matches
    NSTextCheckingTypePhoneNumber NS_ENUM_AVAILABLE(10_7, 4_0)        = 1ULL << 11,           // phone number detection
    NSTextCheckingTypeTransitInformation NS_ENUM_AVAILABLE(10_7, 4_0) = 1ULL << 12            // transit (e.g. flight) info detection
};

使用方法

    NSError *error = nil;
    //根据检测的类型初始化NSDataDetector
    NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypePhoneNumber | NSTextCheckingTypeLink
                                                               error:&error];
    //需要检测的字符串
    NSString *testStr = @"有一个网址：wwww.JohnnyLiu.com有一个电话：15310547654 还有一个地址：大屯路";
    //可以有多种方法检测匹配的数据
    //1.检测然后对每个检测到的数据进行操作
    //- (void)enumerateMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range usingBlock:(void (^)(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop))block;
    //2.检测获得检测得到的数组
    //- (NSArray *)matchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;
    //3.获得检测得到的总数
    //- (NSUInteger)numberOfMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;
    //4.第一个检测到的数据
    //- (NSTextCheckingResult *)firstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;
    //5.第一检测到的数据的Range
    //- (NSRange)rangeOfFirstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;

    [detector enumerateMatchesInString:testStr
                               options:kNilOptions
                                 range:NSMakeRange(0, testStr.length)
                            usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
                                //NSTextCheckingResult有很多属性，和检测的类型相匹配，如URL，phoneNumber，date，addressComponents等等
                                //NSTextCheckingResult还有Range 和 NSTextCheckingType两个属性，方便进行操作
                                NSLog(@"result.range = %@",NSStringFromRange(result.range));
                                if (result.URL) {
                                    NSLog(@"url = %@",result.URL);
                                }
                                if (result.phoneNumber) {
                                    NSLog(@"phone = %@",result.phoneNumber);
                                }
    }];
    //结果-------------------------------------------
    //result.range = {6, 18}
    //url = http://wwww.JohnnyLiu.com
    //result.range = {27, 14}
    //phone = 电话：15310547654