方法选不对，时间全浪费。使用NSDataDetector提高你的编码效率

朱雀 2022-07-12 20:11 108阅读 0赞

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：www.baidu.com有一个电话：12345678901 还有一个地址：大屯路 http://www.isaced.com/post-214.html";
        //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;
        
        NSLog(@"%@", [detector matchesInString:testStr options:kNilOptions range:NSMakeRange(0, testStr.length)]);
        NSLog(@"%lu", (unsigned long)[detector numberOfMatchesInString:testStr options:kNilOptions range:NSMakeRange(0, testStr.length)]);
        NSLog(@"%@", [detector firstMatchInString:testStr options:kNilOptions range:NSMakeRange(0, testStr.length)]);
        NSLog(@"%@", NSStringFromRange([detector rangeOfFirstMatchInString:testStr options:kNilOptions range:NSMakeRange(0, testStr.length)]));
        
        [detector enumerateMatchesInString:testStr
                                   options:0
                                     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);
                                    }
                                }];

打印结果：

2017-01-09 15:13:01.611 GraphicsContext\[322:34281\] (

"<NSLinkCheckingResult: 0x14da1260>\{6, 13\}\{http://www.baidu.com\}",

"<NSPhoneNumberCheckingResult: 0x14dafcd0>\{22, 14\}\{\\U7535\\U8bdd\\Uff1a12345678901\}",

"<NSLinkCheckingResult: 0x14dd5e70>\{48, 35\}\{http://www.isaced.com/post-214.html\}"

)

2017-01-09 15:13:01.615 GraphicsContext\[322:34281\] 3

2017-01-09 15:13:01.616 GraphicsContext\[322:34281\] <NSLinkCheckingResult: 0x14e98a10>\{6, 13\}\{http://www.baidu.com\}

2017-01-09 15:13:01.618 GraphicsContext\[322:34281\] \{6, 13\}

2017-01-09 15:13:01.619 GraphicsContext\[322:34281\] result.range = \{6, 13\}

2017-01-09 15:13:01.620 GraphicsContext\[322:34281\] url = http://www.baidu.com

2017-01-09 15:13:01.621 GraphicsContext\[322:34281\] result.range = \{22, 14\}