判断邮箱的合法性

来源：互联网发布：苹果电脑办公软件wps 编辑：程序博客网时间：2024/04/25 10:13

-(BOOL)validateEmail:(NSString*)email{

    if( (0 != [email rangeOfString:@"@"].length) && (0 != [email rangeOfString:@"."].length) )
    {
        NSMutableCharacterSet *invalidCharSet = [[[[NSCharacterSet alphanumericCharacterSet] invertedSet]mutableCopy]autorelease];
        [invalidCharSet removeCharactersInString:@"_-"];

        NSRange range1 = [email rangeOfString:@"@" options:NSCaseInsensitiveSearch];

        // If username part contains any character other than "." "_" "-"

        NSString *usernamePart = [email substringToIndex:range1.location];
        NSArray *stringsArray1 = [usernamePart componentsSeparatedByString:@"."];
        for (NSString *string in stringsArray1) {
            NSRange rangeOfInavlidChars=[string rangeOfCharacterFromSet: invalidCharSet];
            if(rangeOfInavlidChars.length !=0 || [string isEqualToString:@""])
                return NO;
        }

        NSString *domainPart = [email substringFromIndex:range1.location+1];
        NSArray *stringsArray2 = [domainPart componentsSeparatedByString:@"."];

        for (NSString *string in stringsArray2) {
            NSRange rangeOfInavlidChars=[string rangeOfCharacterFromSet:invalidCharSet];
            if(rangeOfInavlidChars.length !=0 || [string isEqualToString:@""])
                return NO;
        }

        return YES;
    }
    else // no ''@'' or ''.'' present
        return NO;

}

转自 http://iphoneapp-dev.blogspot.com/search/label/Email%20Validation%20in%20iPhone%20application