正则表达式(系统)

第三方库正则表达式:用法http://see.xidian.edu.cn/cpp/html/1435.html

//邮箱验证

- (BOOL)isValidateEmail:(NSString *)email

{

NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+.[A-Za-z]{2,4}";

NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",emailRegex];

return [emailTest evaluateWithObject:email];

}

//用户名

- (BOOL)validateUserName:(NSString *)name

{

NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$";

NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex];

BOOL B = [userNamePredicate evaluateWithObject:name];

return B;

}

//昵称

- (BOOL)validateNickname:(NSString *)nickname

{

NSString *nicknameRegex = @"^[/u4e00-/u9fa5]{4,8}$";

NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",nicknameRegex];

return [passWordPredicate evaluateWithObject:nickname];

}

//密码

-(BOOL)validatePassword:(NSString *)passWord

{

NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$";

NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex];

return [passWordPredicate evaluateWithObject:passWord];

}

//身份证号

- (BOOL)validateIdentityCard:(NSString *)identityCard

{

BOOL flag;

if (identityCard.length <= 0) {

flag = NO;

return flag;

}

NSString *regex2 = @"^(//d{14}|//d{17})(//d|[xX])$";

NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2];

return [identityCardPredicate evaluateWithObject:identityCard];

}

//手机号码验证

- (BOOL)validateMobile:(NSString *)mobile

{

//手机号以13， 15，18开头，八个 /d 数字字符

NSString *phoneRegex = @"^((13[0-9])|(15[^4,//D])|(18[0,0-9]))//d{8}$";

NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];

return [phoneTest evaluateWithObject:mobile];

}

//车牌号验证

- (BOOL)validateCarNo:(NSString *)carNo

{

NSString *carRegex = @"^[/u4e00-/u9fa5]{1}[a-zA-Z]{1}[a-zA-Z_0-9]{4}[a-zA-Z_0-9_/u4e00-/u9fa5]$";

NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",carRegex];

NSLog(@"carTest is %@",carTest);

return [carTest evaluateWithObject:carNo];

}

//车型

- (BOOL)validateCarType:(NSString *)CarType

{

NSString *CarTypeRegex = @"^[/u4E00-/u9FFF]+$";

NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CarTypeRegex];

return [carTest evaluateWithObject:CarType];

}

//网址

- (BOOL)validateUrlString:(NSString *)urlString

{

NSString *urlStringRegex = @"^([a-zA-Z]+://)?([w-.]+)(.[a-zA-Z0-9]+)(:d{0,5})?/?([w-/]*).?([a-zA-Z]*)??(([w-]*=[w%]*&?)*)$";

NSPredicate *urlStringPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",urlStringRegex];

return [urlStringPredicate evaluateWithObject:urlString];

}

1.利用NSPredicate（谓词）匹配

例如匹配有效邮箱：

NSString ＊email ＝ @“nijino_saki@163.com”；

NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+.[A-Za-z]{2,4}";

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];

BOOLisValid = [predicate evaluateWithObject:email];

谓词匹配比较灵活，但是需要有谓词的相关知识。

2.利用rangeOfString：option：直接查找

NSString *searchText = @"// Do any additional setup after loading the view,typically from a nib.";

NSRange range = [searchText rangeOfString:@"(?:[^,])*." options:NSRegularExpressionSearch];

if (range.location != NSNotFound) {

NSLog(@"%@",[searchText substringWithRange:range]);

}

options中设定NSRegularExpressionSearch就是表示利用正则表达式匹配，会返回第一个匹配结果的位置。

3.使用正则表达式类

NSString *searchText = @"// Do any additional setup after loading the view,typically from a nib.";

NSError *error = NULL;

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(?:[^,])*." options:NSRegularExpressionCaseInsensitive error:&error];

NSTextCheckingResult *result = [regex firstMatchInString:searchText options:0 range:NSMakeRange(0,[searchText length])];

if (result) {

NSLog(@"%@n",[searchText substringWithRange:result.range]);

}

使用系统的正则表达式类（NSRegularExpression）会返回匹配的多个结果。

[(S*?)]

#define FACE_ICON_NAME [(S*?)]

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!