验证手机号
// 验证手机号
+ (BOOL)isValidatePhone:(NSString *)phone{
NSString *phoneRegex = @”^1([358][0-9]|4[579]|66|7[0135678]|9[89])[0-9]{8}$”;
NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@”SELF MATCHES %@”, phoneRegex];
return [phoneTest evaluateWithObject:phone];
}

邮箱账号有效性判断
// 邮箱账号的有效性判断
+ (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];
}

匹配密码格式(长度6~20位，只能是数字、大小写字母)
// 匹配密码格式
+ (BOOL)isValidatePassword:(NSString *)password{
NSString * passwordRegex = @”[a-zA-Z0-9]{6,20}”;
NSPredicate * passwordTest = [NSPredicate predicateWithFormat:@”SELF MATCHES %@”, passwordRegex];
return [passwordTest evaluateWithObject:password];
}

车牌号码判断
// 车牌号码正则表达式
+ (BOOL)isValidateCarID:(NSString *)carID{
if (carID.length==7) {
//普通汽车，7位字符，不包含I和O，避免与数字1和0混淆
NSString *carRegex = @”^[\u4e00-\u9fa5]{1}[a-hj-np-zA-HJ-NP-Z]{1}[a-hj-np-zA-HJ-NP-Z0-9]{4}[a-hj-np-zA-HJ-NP-Z0-9\u4e00-\u9fa5]$”;
NSPredicate *carTest = [NSPredicate predicateWithFormat:@”SELF MATCHES %@”, carRegex];
return [carTest evaluateWithObject:carID];
}else if(carID.length==8){
//新能源车,8位字符，*位：省份简称（1位汉字），第二位：发牌机关代号（1位字母）;
//小型车，第三位：只能用字母D或字母F，第四位：字母或者数字，后四位：必须使用数字;([DF][A-HJ-NP-Z0-9][0-9]{4})
//大型车3-7位：必须使用数字，后一位：只能用字母D或字母F。([0-9]{5}[DF])
NSString *carRegex = @”^[\u4e00-\u9fa5]{1}[a-hj-np-zA-HJ-NP-Z]{1}([0-9]{5}[d|f|D|F]|[d|f|D|F][a-hj-np-zA-HJ-NP-Z0-9][0-9]{4})$”;
NSPredicate *carTest = [NSPredicate predicateWithFormat:@”SELF MATCHES %@”, carRegex];
return [carTest evaluateWithObject:carID];
}
return NO;
}

身份证号判断
// 身份证号段正则表达式
+ (BOOL)isValidateIDCard:(NSString *)identityString{
if (identityString.length != 18) return NO;
// 正则表达式判断基本 身份证号是否满足格式
NSString *regex2 = @”^(^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$)|(^[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])((\\d{4})|\\d{3}[Xx])$)$”;
NSPredicate *identityStringPredicate = [NSPredicate predicateWithFormat:@”SELF MATCHES %@”, regex2];
//如果通过该验证，说明身份证格式正确，但准确性还需计算
if(![identityStringPredicate evaluateWithObject:identityString]) return NO;
//** 开始进行校验 *//
//将前17位加权因子保存在数组里
NSArray *idCardWiArray = @[@”7″, @”9″, @”10″, @”5″, @”8″, @”4″, @”2″, @”1″, @”6″, @”3″, @”7″, @”9″, @”10″, @”5″, @”8″, @”4″, @”2″];
//这是除以11后，可能产生的11位余数、验证码，也保存成数组
NSArray *idCardYArray = @[@”1″, @”0″, @”10″, @”9″, @”8″, @”7″, @”6″, @”5″, @”4″, @”3″, @”2″];
//用来保存前17位各自乖以加权因子后的总和
NSInteger idCardWiSum = 0;
for(int i = 0;i < 17;i++) {
NSInteger subStrIndex = [[identityString substringWithRange:NSMakeRange(i, 1)] integerValue];
NSInteger idCardWiIndex = [[idCardWiArray objectAtIndex:i] integerValue];
idCardWiSum += subStrIndex * idCardWiIndex;
}
//计算出校验码所在数组的位置
NSInteger idCardMod=idCardWiSum%11;
//得到*后一位身份证号码
NSString *idCardLast= [identityString substringWithRange:NSMakeRange(17, 1)];
//如果等于2，则说明校验码是10，身份证号码*后一位应该是X
if(idCardMod==2) {
if(![idCardLast isEqualToString:@”X”]||[idCardLast isEqualToString:@”x”]) {
return NO;
}
}else{
//用计算出的验证码与*后一位身份证号码匹配，如果一致，说明通过，否则是无效的身份证号码
if(![idCardLast isEqualToString: [idCardYArray objectAtIndex:idCardMod]]) {
return NO;
}
}
return YES;
}

随机获取八位字符
– (NSString *)obtain8RandomCode {
NSArray *changeArray = [[NSArray alloc] initWithObjects:@”0″,@”1″,@”2″,@”3″,@”4″,@”5″,@”6″,@”7″,@”8″,@”9″,@”A”,@”B”,@”C”,@”D”,@”E”,@”F”,@”G”,@”H”,@”I”,@”J”,@”K”,@”L”,@”M”,@”N”,@”O”,@”P”,@”Q”,@”R”,@”S”,@”T”,@”U”,@”V”,@”W”,@”X”,@”Y”,@”Z”,@”a”,@”b”,@”c”,@”d”,@”e”,@”f”,@”g”,@”h”,@”i”,@”j”,@”k”,@”l”,@”m”,@”n”,@”o”,@”p”,@”q”,@”r”,@”s”,@”t”,@”u”,@”v”,@”w”,@”x”,@”y”,@”z”,@”!”,@”@”,@”#”,@”$”,@”^”,@”&”,@”*”,@”-“,@”+”,nil];
NSArray *specailArray = [[NSArray alloc] initWithObjects:@”!”,@”@”,@”#”,@”$”,@”^”,@”&”,@”*”,@”-“,@”+”, nil];
NSMutableString *changeString = [[NSMutableString alloc] initWithCapacity:8];

NSInteger specialIndex = arc4random()%7;
NSInteger specialArrayIndex = arc4random()%([specailArray count] – 1);
for(int i = 0; i < 8; i++){
if (i==specialIndex) {
changeString = (NSMutableString *)[changeString stringByAppendingString:[specailArray objectAtIndex:specialArrayIndex]];
continue;
}
NSInteger index = arc4random()%([changeArray count] – 1);
changeString = (NSMutableString *)[changeString stringByAppendingString:[changeArray objectAtIndex:index]];
}
return changeString;
}