自定义的正则表达式
//
// main.m
// 正则表达式
//
// Created by apple on 14/11/15.
// Copyright (c) 2014年 heima. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "NSString+Extension.h"
#import "RegexKitLite.h"
int main(int argc,const char * argv[])
{
@autoreleasepool {
NSString *str =@"#呵呵呵#[偷笑] http://foo.com/blah_blah #解放军#//http://foo.com/blah_blah @Ring花椰菜:就#范德萨发生的#舍不得打[test]就惯#急急急#着他吧[挖鼻屎]//@崔西狮:小拳头举起又放下了说点啥好呢…… //@toto97:@崔西狮蹦米咋不揍他#哈哈哈# http://foo.com/blah_blah";
// NSString *str = @"#呵呵呵#返回加快速度会尽#解放军#快发货看电视#好几件#发货了速度了恢复良好";
// 表情的规则
NSString *emotionPattern =@"\\[[0-9a-zA-Z\\u4e00-\\u9fa5]+\\]";
// @的规则
NSString *atPattern =@"@[0-9a-zA-Z\\u4e00-\\u9fa5]+";
// #话题#的规则
NSString *topicPattern =@"#[0-9a-zA-Z\\u4e00-\\u9fa5]+#";
// url链接的规则
NSString *urlPattern =@"\\b(([\\w-]+://?|www[.])[^\\s()<>]+(?:\\([\\w\\d]+\\)|([^[:punct:]\\s]|/)))";
NSString *pattern = [NSStringstringWithFormat:@"%@|%@|%@|%@", emotionPattern, atPattern, topicPattern, urlPattern];
// NSArray *cmps = [str componentsMatchedByRegex:pattern];
// 遍历所有的匹配结果
[str enumerateStringsMatchedByRegex:patternusingBlock:^(NSInteger captureCount,NSString *const__unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
NSLog(@"%@ %@", *capturedStrings,NSStringFromRange(*capturedRanges));
}];
NSLog(@"-------------");
// 以正则表达式为分隔符
[str enumerateStringsSeparatedByRegex:patternusingBlock:^(NSInteger captureCount,NSString *const__unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
NSLog(@"%@ %@", *capturedStrings,NSStringFromRange(*capturedRanges));
}];
}
return 0;
}
void test2()
{
NSString *str =@"#呵呵呵#[偷笑] http://foo.com/blah_blah #解放军#//http://foo.com/blah_blah @Ring花椰菜:就#范德萨发生的#舍不得打[test]就惯#急急急#着他吧[挖鼻屎]//@崔西狮:小拳头举起又放下了说点啥好呢…… //@toto97:@崔西狮蹦米咋不揍他#哈哈哈# http://foo.com/blah_blah";
/**
1.判断字符串是否符合某个特定规则
* 判断某个字符串是否为QQ号码\电话号码\邮箱
2.截取字符串中符合某个特定规则的内容
* 截取@"#呵呵呵#[偷笑]5345http://foo.com/blah_blah #解放军# 58937985"的所有话题\表情\链接
*/
// 1.创建正则表达式
// NSString *pattern = @"[a-zA-Z]{1,}";
// NSString *pattern = @"[a-zA-Z]+";
// 表情的规则
NSString *emotionPattern =@"\\[[0-9a-zA-Z\\u4e00-\\u9fa5]+\\]";
// @的规则
NSString *atPattern =@"@[0-9a-zA-Z\\u4e00-\\u9fa5]+";
// #话题#的规则
NSString *topicPattern =@"#[0-9a-zA-Z\\u4e00-\\u9fa5]+#";
// url链接的规则
NSString *urlPattern =@"\\b(([\\w-]+://?|www[.])[^\\s()<>]+(?:\\([\\w\\d]+\\)|([^[:punct:]\\s]|/)))";
// | 匹配多个条件,相当于or\或
NSString *pattern = [NSStringstringWithFormat:@"%@|%@|%@|%@", emotionPattern, atPattern, topicPattern, urlPattern];
NSRegularExpression *regex = [[NSRegularExpressionalloc] initWithPattern:patternoptions:0error:nil];
// 2.测试字符串
NSArray *results = [regex matchesInString:str options:0range:NSMakeRange(0, str.length)];
// 3.遍历结果
for (NSTextCheckingResult *resultin results) {
NSLog(@"%@ %@",NSStringFromRange(result.range), [strsubstringWithRange:result.range]);
}
}
/**
* 正则表达式的基本使用
*/
void test1()
{
NSString *username = @"6gjkhdjkhgkjh7";
// NSString *pattern = @"^\\d{3}";
// NSString *pattern = @"\\d{3}$";
// 1.创建正则表达式
NSString *pattern = @"^\\d.*\\d$";
NSRegularExpression *regex = [[NSRegularExpressionalloc] initWithPattern:patternoptions:0error:nil];
// 2.测试字符串
NSArray *results = [regex matchesInString:username options:0range:NSMakeRange(0, username.length)];
NSLog(@"%zd", results.count);
/**
使用正则表达式的步骤:
1.创建一个正则表达式对象:定义规则
2.利用正则表达式对象来测试 相应的字符串
*/
// Pattern : 样式\规则
// NSString *pattern = @"ab7";
// [] : 找到内部的某一个字符即可
// NSString *pattern = @"[0123456789]";
// NSString *pattern = @"[0-9]";
// NSString *pattern = @"[a-zA-Z0-9]";
// NSString *pattern = @"[0-9][0-9]";
// NSString *pattern = @"\\d\\d\\d";
// NSString *pattern = @"\\d{2,4}";
// ? + *
// ? : 0个或者1个
// + : 至少1个
// * : 0个或者多个
}
/**
* 普通的做法:检测全数字
*/
void test()
{
NSString *username = @"5347858h7";
BOOL flag = YES;
for (int i =0; i<username.length; i++) {
unichar c = [username characterAtIndex:i];
if (!(c >= '0' && c <= '9')) {
flag = NO;
break;
}
}
if (flag) {
NSLog(@"用户名正确");
} else {
NSLog(@"里面包含了非数字");
}
}