iOS開發收集——驗證判斷語句·正則表達式

最近，在公司接手重構一個項目，發現之前的開發在驗證格式這塊寫的太亂了，到處都有相關的驗證代碼，故而，寫了這篇文章，供自己收藏，也分享給大家。

開發一直離不開一些常用驗證格式，比如：郵箱，手機號等等，在開發過程中一般都會新建一個工具類，專門管理這些驗證方式，簡便開發過程。一般都采用正則表達式的形式來做判斷，本文列舉一些項目中非常實用的一些正則表達式的判斷語句，以后開發起來直接復制粘貼就可以，這樣大大節省了開發時間，不多說，直接上代碼。

1.驗證移動手機號：

+ (BOOL)isMobile:(NSString*)mobile
{
    NSString *regex = @"^1+[34578]+\d{9}";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pred evaluateWithObject:mobile];
}

2.郵箱驗證：

+ (BOOL)isEmail:(NSString*)email
{
    NSString *regex = @"^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pred evaluateWithObject:email];
}

3.整形驗證

+ (BOOL)isPureInt:(NSString*)string{
    NSScanner* scan = [NSScanner scannerWithString:string];
    int val;
    return[scan scanInt:&val] && [scan isAtEnd];
}

4.浮點型驗證

- (BOOL)isPureFloat:(NSString*)string{
    NSScanner* scan = [NSScanner scannerWithString:string];
    float val;
    return[scan scanFloat:&val] && [scan isAtEnd];
}

5.中文驗證

+ (BOOL)isChinese:(NSString*)chinese
{
    NSString *regex = @"^[\u4e00-\u9fa5]";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pred evaluateWithObject: chinese];
}

6.網址URL驗證

+ (BOOL)isURL:(NSString*)url
{
    NSString *regex = @"[a-zA-z]+://[^\s]*";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [pred evaluateWithObject: url];
}

7.身份證號驗證(比較繁瑣)

+ (BOOL)verifyIDCardNumber:(NSString *)IDCardNumber 
{ 
IDCardNumber = [IDCardNumber stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 
if ([IDCardNumber length] != 18) 
{ 
return NO; 
} 
NSString *mmdd = @”(((0[13578]|1[02])(0[1-9]|[12][0-9]|3[01]))|((0[469]|11)(0[1-9]|[12][0-9]|30))|(02(0[1-9]|[1][0-9]|2[0-8])))”; 
NSString *leapMmdd = @”0229”; 
NSString *year = @”(19|20)[0-9]{2}”; 
NSString *leapYear = @”(19|20)(0[48]|[2468][048]|[13579][26])”; 
NSString *yearMmdd = [NSString stringWithFormat:@”%@%@”, year, mmdd]; 
NSString *leapyearMmdd = [NSString stringWithFormat:@”%@%@”, leapYear, leapMmdd]; 
NSString *yyyyMmdd = [NSString stringWithFormat:@”((%@)|(%@)|(%@))”, yearMmdd, leapyearMmdd, @”20000229”]; 
NSString *area = @”(1[1-5]|2[1-3]|3[1-7]|4[1-6]|5[0-4]|6[1-5]|82|[7-9]1)[0-9]{4}”; 
NSString *regex = [NSString stringWithFormat:@”%@%@%@”, area, yyyyMmdd , @”[0-9]{3}[0-9Xx]”];

NSPredicate *regexTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
if (![regexTest evaluateWithObject:IDCardNumber])
{
    return NO;
}
int summary = ([IDCardNumber substringWithRange:NSMakeRange(0,1)].intValue + [IDCardNumber substringWithRange:NSMakeRange(10,1)].intValue) *7
+ ([IDCardNumber substringWithRange:NSMakeRange(1,1)].intValue + [IDCardNumber substringWithRange:NSMakeRange(11,1)].intValue) *9
+ ([IDCardNumber substringWithRange:NSMakeRange(2,1)].intValue + [IDCardNumber substringWithRange:NSMakeRange(12,1)].intValue) *10
+ ([IDCardNumber substringWithRange:NSMakeRange(3,1)].intValue + [IDCardNumber substringWithRange:NSMakeRange(13,1)].intValue) *5
+ ([IDCardNumber substringWithRange:NSMakeRange(4,1)].intValue + [IDCardNumber substringWithRange:NSMakeRange(14,1)].intValue) *8
+ ([IDCardNumber substringWithRange:NSMakeRange(5,1)].intValue + [IDCardNumber substringWithRange:NSMakeRange(15,1)].intValue) *4
+ ([IDCardNumber substringWithRange:NSMakeRange(6,1)].intValue + [IDCardNumber substringWithRange:NSMakeRange(16,1)].intValue) *2
+ [IDCardNumber substringWithRange:NSMakeRange(7,1)].intValue *1 + [IDCardNumber substringWithRange:NSMakeRange(8,1)].intValue *6
+ [IDCardNumber substringWithRange:NSMakeRange(9,1)].intValue *3;
NSInteger remainder = summary % 11;
NSString *checkBit = @"";
NSString *checkString = @"10X98765432";
checkBit = [checkString substringWithRange:NSMakeRange(remainder,1)];// 判斷校驗位
return [checkBit isEqualToString:[[IDCardNumber substringWithRange:NSMakeRange(17,1)] uppercaseString]];
}

8.一般用戶名的驗證

+ (BOOL) isUserName:(NSString *)name
{
    NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$";
    NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex]；    
    return  [userNamePredicate evaluateWithObject:name];
}

來自：http://www.jianshu.com/p/35865204d037