IOS 正则和NSPredicate使用样例
- (NSDictionary *)urlDic:(NSString *)urlString
{
NSString * regex = @"([^?=&]+)(=([^&]*))";
NSRegularExpression *numberRegex = [[NSRegularExpression alloc] initWithPattern:regex options:NSRegularExpressionCaseInsensitive error:nil];
NSArray *parmMatchs = [numberRegex matchesInString:urlString options:0 range:NSMakeRange(0, urlString.length)];
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
for (NSString *string in parmMatchs) {
NSArray *array = [string componentsSeparatedByString:@"="];
[dic setObject:array[1] forKey:array[0]];
}
return dic;
}
- (NSString *)pasretel:(NSString *)urlString{
NSString *regex = @"\\d";
NSRegularExpression *numberRegex = [[NSRegularExpressionalloc] initWithPattern:regex options:NSRegularExpressionCaseInsensitiveerror:nil];
NSArray *parmMatchs = [numberRegex matchesInString:urlString options:0 range:NSMakeRange(0, urlString.length)];
NSMutableString *str = [[NSMutableStringalloc] init];
for (NSTextCheckingResult *match in parmMatchs) {
NSRange matchRange = match.range;
[str appendString:[NSStringstringWithFormat:@"%@",[urlString substringWithRange:matchRange]]];
}
return str;
}
- (NSArray *)getOnlyNum:(NSString *)str
{
NSString *onlyNumStr = [str stringByReplacingOccurrencesOfString:@"[^0-9,]" withString:@"" options:NSRegularExpressionSearch range:NSMakeRange(0, [str length])];
NSArray *numArr = [onlyNumStr componentsSeparatedByString:@","];
return numArr;
}
testStr *str = [[testStr alloc]init];
NSString *testStr = @"111111(哈哈),22222222222<各个>,3333333333[订单],44444444";
NSLog(@"结果为:%@",[str getOnlyNum:testStr]);
输出结果：
2013-05-14 14:54:00.306 test[3559:303] 结果为:(
111111,
22222222222,
3333333333,
)
NSPredicate最常用到的函数
+ (NSPredicate *)predicateWithFormat:(NSString *)predicateFormat, ...;
1.比较运算符 > 、< 、== 、 >= 、<= 、 !=
例：@"number >= 99"
2.范围运算符：IN 、BETWEEN
例：@"number BETWEEN {1,5}"
@"address IN {'shanghai','nanjing'}"
3.字符串本身:SELF
例：@"SELF == 'APPLE'"
4.字符串相关：BEGINSWITH、ENDSWITH、CONTAINS
例：@"name CONTAIN[cd] 'ang'" //包含某个字符串
@"name BEGINSWITH[c] 'sh'" //以某个字符串开头
@"name ENDSWITH[d] 'ang'" //以某个字符串结束
注:[c]不区分大小写 , [d]不区分发音符号即没有重音符号 , [cd]既不区分大小写，也不区分发音符号。
5.通配符：LIKE
例：@"name LIKE[cd] '*er*'" //*代表通配符,Like也接受[cd].
@"name LIKE[cd] '???er*'"
6.正则表达式：MATCHES
例：NSString *regex = @"^A.+e$"; //以A开头，e结尾
@"name MATCHES %@",regex
实际应用:对NSArray进行过滤
NSArray *array = [[NSArray alloc]initWithObjects:@"beijing",@"shanghai",@"guangzou",@"wuhan", nil]; NSString *string = @"ang"; NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF CONTAINS %@",string]; NSLog(@"%@",[array filteredArrayUsingPredicate:pred]);
实际应用:判断字符串首字母是否为字母
NSString *regex = @"[A-Za-z]+"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex]; if ([predicate evaluateWithObject:aString]) { }
实际应用:字符串替换
NSError* error = NULL; NSRegularExpression* regex = [NSRegularExpression regularExpressionWithPattern:@"(encoding=\")[^\"]+(\")" options:0 error:&error]; NSString* sample = @"<xml encoding=\"abc\"></xml><xml encoding=\"def\"></xml><xml encoding=\"ttt\"></xml>"; NSLog(@"Start:%@",sample); NSString* result = [regex stringByReplacingMatchesInString:sample options:0 range:NSMakeRange(0, sample.length) withTemplate:@"$1utf-8$2"]; NSLog(@"Result:%@", result);
实际应用:判断手机号码，电话号码函数
- (BOOL)isMobileNumber:(NSString *)mobileNum { /** * 手机号码 * 移动：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188 * 联通：130,131,132,152,155,156,185,186 * 电信：133,1349,153,180,189 */ NSString * MOBILE = @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$"; /** 10 * 中国移动：China Mobile 11 * 134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188 12 */ NSString * CM = @"^1(34[0-8]|(3[5-9]|5[017-9]|8[278])\\d)\\d{7}$"; /** 15 * 中国联通：China Unicom 16 * 130,131,132,152,155,156,185,186 17 */ NSString * CU = @"^1(3[0-2]|5[256]|8[56])\\d{8}$"; /** 20 * 中国电信：China Telecom 21 * 133,1349,153,180,189 22 */ NSString * CT = @"^1((33|53|8[09])[0-9]|349)\\d{7}$"; /** 25 * 大陆地区固话及小灵通 26 * 区号：010,020,021,022,023,024,025,027,028,029 27 * 号码：七位或八位 28 */ // NSString * PHS = @"^0(10|2[0-5789]|\\d{3})\\d{7,8}$"; NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE]; NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM]; NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU]; NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT]; if (([regextestmobile evaluateWithObject:mobileNum] == YES) || ([regextestcm evaluateWithObject:mobileNum] == YES) || ([regextestct evaluateWithObject:mobileNum] == YES) || ([regextestcu evaluateWithObject:mobileNum] == YES)) { if([regextestcm evaluateWithObject:mobileNum] == YES) { NSLog(@"China Mobile"); } else if([regextestct evaluateWithObject:mobileNum] == YES) { NSLog(@"China Telecom"); } else if ([regextestcu evaluateWithObject:mobileNum] == YES) { NSLog(@"China Unicom"); } else { NSLog(@"Unknow"); } return YES; } else { return NO; } }
实际应用:NSDate进行筛选
NSDate *endDate = [[NSDate date] retain]; NSTimeInterval timeInterval= [endDate timeIntervalSinceReferenceDate]; timeInterval -=3600*24*10; NSDate *beginDate = [[NSDate dateWithTimeIntervalSinceReferenceDate:timeInterval] retain]; //对coredata进行筛选(假设有fetchRequest) NSPredicate *predicate_date = [NSPredicate predicateWithFormat:@"date >= %@ AND date <= %@", beginDate,endDate]; [fetchRequest setPredicate:predicate_date]; //释放retained的对象 [endDate release]; [beginDate release];
