1.去RegexKitLite下载类库,解压出来会有一个例子包及2个文件,其实用到的就这2个文件,添加到工程中。 备用地址:
http://www.cocoachina.com/bbs/job.php?action-download-pid-135286-tid-18111-aid-11143.html - Lv
2.工程中添加libicucore.dylib frameworks。
3.现在所有的nsstring对象就可以调用RegexKitLite中的方法了。
NSString *email = @”kkk@aaa.com”;
[email isMatchedByRegex:@"\\b([a-zA-Z0-9%_.+\\-]+)@([a-zA-Z0-9.\\-]+?\\.[a-zA-Z]{2,6})\\b”];
返回YES,证明是email格式,需要注意的是RegexKitLite用到的正则表达式和wiki上的略有区别。
searchString = @”http://www.example.com:8080/index.html”;
regexString = @”\\bhttps?://[a-zA-Z0-9\\-.]+(?::(\\d+))?(?:(?:/[a-zA-Z0-9\\-._?,'+\\&%$=~*!():@\\\\]*)+)?”;
NSInteger portInteger = [[searchString stringByMatching:regexString capture:1L] integerValue];
NSLog(@”portInteger: ‘%ld’”, (long)portInteger);
// 2008-10-15 08:52:52.500 host_port[8021:807] portInteger: ‘8080′
取string中http的例子。
常用正则表达式:
匹配双字节字符(包括汉字在内):[^x00-xff]
评注:可以用来计算字符串的长度(一个双字节字符长度计2,ASCII字符计1)
匹配空白行的正则表达式:ns*r
评注:可以用来删除空白行
匹配HTML标记的正则表达式:<(S*?)[^>]*>.*?|<.*? />
评注:网上流传的版本太糟糕,上面这个也仅仅能匹配部分,对于复杂的嵌套标记依旧无能为力
匹配首尾空白字符的正则表达式:^s*|s*$
评注:可以用来删除行首行尾的空白字符(包括空格、制表符、换页符等等),非常有用的表达式
匹配Email地址的正则表达式:w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*
评注:表单验证时很实用
匹配网址URL的正则表达式:[a-zA-z]+://[^s]*
评注:网上流传的版本功能很有限,上面这个基本可以满足需求
匹配帐号是否合法(字母开头,允许5-16字节,允许字母数字下划线):^[a-zA-Z][a-zA-Z0-9_]{4,15}$
评注:表单验证时很实用
匹配国内电话号码:d{3}-d{8}|d{4}-d{7}
评注:匹配形式如 0511-4405222 或 021-87888822
匹配腾讯QQ号:[1-9][0-9]{4,}
评注:腾讯QQ号从10000开始
匹配中国邮政编码:[1-9]d{5}(?!d)
评注:中国邮政编码为6位数字
匹配×××:d{15}|d{18}
评注:中国的×××为15位或18位
匹配ip地址:d+.d+.d+.d+
评注:提取ip地址时有用
匹配特定数字:
^[1-9]d*$ //匹配正整数
^-[1-9]d*$ //匹配负整数
^-?[1-9]d*$ //匹配整数
^[1-9]d*|0$ //匹配非负整数(正整数 + 0)
^-[1-9]d*|0$ //匹配非正整数(负整数 + 0)
^[1-9]d*.d*|0.d*[1-9]d*$ //匹配正浮点数
^-([1-9]d*.d*|0.d*[1-9]d*)$ //匹配负浮点数
^-?([1-9]d*.d*|0.d*[1-9]d*|0?.0+|0)$ //匹配浮点数
^[1-9]d*.d*|0.d*[1-9]d*|0?.0+|0$ //匹配非负浮点数(正浮点数 + 0)
^(-([1-9]d*.d*|0.d*[1-9]d*))|0?.0+|0$ //匹配非正浮点数(负浮点数 + 0)
评注:处理大量数据时有用,具体应用时注意修正
匹配特定字符串:
^[A-Za-z]+$ //匹配由26个英文字母组成的字符串
^[A-Z]+$ //匹配由26个英文字母的大写组成的字符串
^[a-z]+$ //匹配由26个英文字母的小写组成的字符串
^[A-Za-z0-9]+$ //匹配由数字和26个英文字母组成的字符串
^w+$ //匹配由数字、26个英文字母或者下划线组成的字符串
在使用RegularExpressionValidator验证控件时的验证功能及其验证表达式介绍如下:
只能输入数字:“^[0-9]*$”
只能输入n位的数字:“^d{n}$”
只能输入至少n位数字:“^d{n,}$”
只能输入m-n位的数字:“^d{m,n}$”
只能输入零和非零开头的数字:“^(0|[1-9][0-9]*)$”
只能输入有两位小数的正实数:“^[0-9]+(.[0-9]{2})?$”
只能输入有1-3位小数的正实数:“^[0-9]+(.[0-9]{1,3})?$”
只能输入非零的正整数:“^+?[1-9][0-9]*$”
只能输入非零的负整数:“^-[1-9][0-9]*$”
只能输入长度为3的字符:“^.{3}$”
只能输入由26个英文字母组成的字符串:“^[A-Za-z]+$”
只能输入由26个大写英文字母组成的字符串:“^[A-Z]+$”
只能输入由26个小写英文字母组成的字符串:“^[a-z]+$”
只能输入由数字和26个英文字母组成的字符串:“^[A-Za-z0-9]+$”
只能输入由数字、26个英文字母或者下划线组成的字符串:“^w+$”
验证用户密码:“^[a-zA-Z]w{5,17}$”正确格式为:以字母开头,长度在6-18之间,
只能包含字符、数字和下划线。
验证是否含有^%&',;=?$"等字符:“[^%&',;=?$x22]+”
只能输入汉字:“^[u4e00-u9fa5],{0,}$”
验证Email地址:“^w+[-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$”
验证InternetURL:“^http://([w-]+.)+[w-]+(/[w-./?%&=]*)?$”
验证电话号码:“^((d{3,4})|d{3,4}-)?d{7,8}$”
正确格式为:“XXXX-XXXXXXX”,“XXXX-XXXXXXXX”,“XXX-XXXXXXX”,
“XXX-XXXXXXXX”,“XXXXXXX”,“XXXXXXXX”。
验证×××号(15位或18位数字):“^d{15}|d{}18$”
验证一年的12个月:“^(0?[1-9]|1[0-2])$”正确格式为:“01”-“09”和“1”“12”
验证一个月的31天:“^((0?[1-9])|((1|2)[0-9])|30|31)$”
正确格式为:“01”“09”和“1”“31”。
匹配中文字符的正则表达式: [u4e00-u9fa5]
匹配双字节字符(包括汉字在内):[^x00-xff]
匹配空行的正则表达式:n[s| ]*r
匹配HTML标记的正则表达式:/<(.*)>.*|<(.*) />/
匹配首尾空格的正则表达式:(^s*)|(s*$)
匹配Email地址的正则表达式:w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*
匹配网址URL的正则表达式:[url=http://%28[w-]+.%29+[w-]+%28/[w]http://([w-]+.)+[w-]+(/[w[/url]- ./?%&=]*)?
基本使用的例子(更多信息参看官方文档)
1.
NSString *searchString = @"This is neat.";
NSString *regexString = @"(//w+)//s+(//w+)//s+(//w+)";
NSRange matchedRange = NSMakeRange(NSNotFound, 0UL);
NSError *error = NULL;
matchedRange = [searchString rangeOfRegex:regexString options:RKLNoOptions inRange:searchRange capture:2L error:&error];
NSLog(@"matchedRange: %@", NSStringFromRange(matchedRange));
// 2008-03-18 03:51:16.530 test[51583:813] matchedRange: {5, 2},//匹配到‘is‘
NSString *matchedString = [searchString substringWithRange:matchedRange];
NSLog(@"matchedString: '%@'", matchedString);
// 2008-03-18 03:51:16.532 test[51583:813] matchedString: 'is' //生成子字符串
NSString *searchString = @"This is neat.";
NSString *regexString = @"(//w+)//s+(//w+)//s+(//w+)";
NSRange matchedRange = NSMakeRange(NSNotFound, 0UL);
NSError *error = NULL;
matchedRange = [searchString rangeOfRegex:regexString options:RKLNoOptions inRange:searchRange capture:2L error:&error];
NSLog(@"matchedRange: %@", NSStringFromRange(matchedRange));
// 2008-03-18 03:51:16.530 test[51583:813] matchedRange: {5, 2},//匹配到‘is‘
NSString *matchedString = [searchString substringWithRange:matchedRange];
NSLog(@"matchedString: '%@'", matchedString);
// 2008-03-18 03:51:16.532 test[51583:813] matchedString: 'is' //生成子字符串
NSString *searchString = @"This is neat.";
NSString *regexString = @"(//w+)//s+(//w+)//s+(//w+)";
NSString *matchedString = [searchString stringByMatching:regexString capture:2L];
NSLog(@"matchedString: '%@'", matchedString);
// 2008-03-18 03:53:42.949 test[51583:813] matchedString: 'is'
NSString *searchString = @"This is neat.";
NSString *regexString = @"(//w+)//s+(//w+)//s+(//w+)";
NSString *matchedString = [searchString stringByMatching:regexString capture:2L];
NSLog(@"matchedString: '%@'", matchedString);
// 2008-03-18 03:53:42.949 test[51583:813] matchedString: 'is'
NSString *searchString = @"This is neat.";
NSString *regexString = @"//b(//w+)//b";
NSString *replaceWithString = @"{$1}";
NSString *replacedString = NULL;
replacedString = [searchString stringByReplacingOccurrencesOfRegex:regexString withString:replaceWithString];
//NSMutableString可以直接替换,并返回替换的次数
NSLog(@"replaced string: '%@'", replacedString);
// 2008-07-01 19:03:03.195 test[68775:813] replaced string: '{This} {is} {neat}.'
NSMutableString *mutableString = [NSMutableString stringWithString:@"This is neat."];
NSString *regexString = @"//b(//w+)//b";
NSString *replaceWithString = @"{$1}";
NSUInteger replacedCount = 0UL;
replacedCount = [mutableString replaceOccurrencesOfRegex:regexString withString:replaceWithString];
NSLog(@"count: %lu string: '%@'", (u_long)replacedCount, mutableString);
// 2008-07-01 21:25:43.433 test[69689:813] count: 3 string: '{This} {is} {neat}.'
NSString *searchString = @"This is neat.";
NSString *regexString = @"//b(//w+)//b";
NSString *replaceWithString = @"{$1}";
NSString *replacedString = NULL;
replacedString = [searchString stringByReplacingOccurrencesOfRegex:regexString withString:replaceWithString];
//NSMutableString可以直接替换,并返回替换的次数
NSLog(@"replaced string: '%@'", replacedString);
// 2008-07-01 19:03:03.195 test[68775:813] replaced string: '{This} {is} {neat}.'
NSMutableString *mutableString = [NSMutableString stringWithString:@"This is neat."];
NSString *regexString = @"//b(//w+)//b";
NSString *replaceWithString = @"{$1}";
NSUInteger replacedCount = 0UL;
replacedCount = [mutableString replaceOccurrencesOfRegex:regexString withString:replaceWithString];
NSLog(@"count: %lu string: '%@'", (u_long)replacedCount, mutableString);
// 2008-07-01 21:25:43.433 test[69689:813] count: 3 string: '{This} {is} {neat}.'
NSString *searchString = @"This is neat.";
NSString *regexString = @"//s+";
NSArray *splitArray = NULL;
splitArray = [searchString componentsSeparatedByRegex:regexString];
// splitArray == { @"This", @"is", @"neat." }
NSLog(@"splitArray: %@", splitArray);
NSString *searchString = @"This is neat.";
NSString *regexString = @"//s+";
NSArray *splitArray = NULL;
splitArray = [searchString componentsSeparatedByRegex:regexString];
// splitArray == { @"This", @"is", @"neat." }
NSLog(@"splitArray: %@", splitArray);
NSString *searchString = @"$10.23, $1024.42, $3099";
NSString *regexString = @"//$((//d+)(?://.(//d+)|//.?))";
NSArray *matchArray = NULL;
matchArray = [searchString componentsMatchedByRegex:regexString];
// matchArray == { @"$10.23", @"$1024.42", @"$3099" };
NSLog(@"matchArray: %@", matchArray);
6.返回所有匹配的字符串数组处理所有的括号
NSString *searchString = @"$10.23, $1024.42, $3099";
NSString *regexString = @"//$((//d+)(?://.(//d+)|//.?))";
NSArray *capturesArray = NULL;
capturesArray = [searchString arrayOfCaptureComponentsMatchedByRegex:regexString];
/* capturesArray ==
[NSArray arrayWithObjects:
[NSArray arrayWithObjects: @"$10.23", @"10.23", @"10", @"23", NULL],
[NSArray arrayWithObjects:@"$1024.42", @"1024.42", @"1024", @"42", NULL],
[NSArray arrayWithObjects: @"$3099", @"3099", @"3099", @"", NULL],
NULL];
*/
NSLog(@"capturesArray: %@", capturesArray);
输出结果:
shell% ./capturesArray
2009-05-06 03:25:46.852 capturesArray[69981:10b] capturesArray: (
(
"$10.23",
"10.23",
10,
23
),
(
"$1024.42",
"1024.42",
1024,
42
),
(
"$3099",
3099,
3099,
""
)
)
NSString *searchString = @"$10.23, $1024.42, $3099";
NSString *regexString = @"//$((//d+)(?://.(//d+)|//.?))";
NSArray *matchArray = NULL;
matchArray = [searchString componentsMatchedByRegex:regexString];
// matchArray == { @"$10.23", @"$1024.42", @"$3099" };
NSLog(@"matchArray: %@", matchArray);
6.返回所有匹配的字符串数组处理所有的括号
NSString *searchString = @"$10.23, $1024.42, $3099";
NSString *regexString = @"//$((//d+)(?://.(//d+)|//.?))";
NSArray *capturesArray = NULL;
capturesArray = [searchString arrayOfCaptureComponentsMatchedByRegex:regexString];
/* capturesArray ==
[NSArray arrayWithObjects:
[NSArray arrayWithObjects: @"$10.23", @"10.23", @"10", @"23", NULL],
[NSArray arrayWithObjects:@"$1024.42", @"1024.42", @"1024", @"42", NULL],
[NSArray arrayWithObjects: @"$3099", @"3099", @"3099", @"", NULL],
NULL];
*/
NSLog(@"capturesArray: %@", capturesArray);
输出结果:
shell% ./capturesArray
2009-05-06 03:25:46.852 capturesArray[69981:10b] capturesArray: (
(
"$10.23",
"10.23",
10,
23
),
(
"$1024.42",
"1024.42",
1024,
42
),
(
"$3099",
3099,
3099,
""
)
)
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