常见的正则表达式
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//邮箱
+ (BOOL) validateEmail:(NSString *)email{ NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; return [emailTest evaluateWithObject:email];}//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]+$"; NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CarTypeRegex]; return [carTest evaluateWithObject:CarType];}//用户名+ (BOOL) validateUserName:(NSString *)name{ NSString *userNameRegex = @"^[A-Za-z0-9]{4,20}+$"; NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex]; BOOL B = [userNamePredicate evaluateWithObject:name]; return B;}//密码+ (BOOL) validatePassword:(NSString *)passWord{ NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$"; NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex]; return [passWordPredicate evaluateWithObject:passWord];}//昵称+ (BOOL) validateNickname:(NSString *)nickname{ NSString *nicknameRegex = @"([\u4e00-\u9fa5]{2,5})(·[\u4e00-\u9fa5]{2,5})*"; NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",nicknameRegex]; return [passWordPredicate evaluateWithObject:nickname];}//身份证号+ (BOOL) validateIdentityCard: (NSString *)identityCard{ BOOL flag; if (identityCard.length <= 0) { flag = NO; return flag; } NSString *regex2 = @"^(\\d{14}|\\d{17})(\\d|[xX])$"; NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [identityCardPredicate evaluateWithObject:identityCard];}//银行卡+ (BOOL) validateBankCardNumber: (NSString *)bankCardNumber{ BOOL flag; if (bankCardNumber.length <= 0) { flag = NO; return flag; } NSString *regex2 = @"^(\\d{15,30})"; NSPredicate *bankCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [bankCardPredicate evaluateWithObject:bankCardNumber];}//银行卡后四位+ (BOOL) validateBankCardLastNumber: (NSString *)bankCardNumber{ BOOL flag; if (bankCardNumber.length != 4) { flag = NO; return flag; } NSString *regex2 = @"^(\\d{4})"; NSPredicate *bankCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [bankCardPredicate evaluateWithObject:bankCardNumber];}//CVN+ (BOOL) validateCVNCode: (NSString *)cvnCode{ BOOL flag; if (cvnCode.length <= 0) { flag = NO; return flag; } NSString *regex2 = @"^(\\d{3})"; NSPredicate *cvnCodePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [cvnCodePredicate evaluateWithObject:cvnCode];}//month+ (BOOL) validateMonth: (NSString *)month{ BOOL flag; if (!month.length == 2) { flag = NO; return flag; } NSString *regex2 = @"(^(0)([0-9])$)|(^(1)([0-2])$)"; NSPredicate *monthPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [monthPredicate evaluateWithObject:month];}//month+ (BOOL) validateYear: (NSString *)year{ BOOL flag; if (!year.length == 2) { flag = NO; return flag; } NSString *regex2 = @"^([1-3])([0-9])$"; NSPredicate *yearPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [yearPredicate evaluateWithObject:year];}//verifyCode+ (BOOL) validateVerifyCode: (NSString *)verifyCode{ BOOL flag; if (!verifyCode.length == 6) { flag = NO; return flag; } NSString *regex2 = @"^(\\d{6})"; NSPredicate *verifyCodePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2]; return [verifyCodePredicate evaluateWithObject:verifyCode];以上是关于常见的正则表达式的主要内容，如果未能解决你的问题，请参考以下文章