ios 常用的正则表达式（手机号邮箱md5加密验证空字符串等）

#pragma mark - 验证相关
/* 验证相关  */

//1.是否是手机号
- (BOOL)isMobileNumber;

//2.是否是邮箱
-(BOOL)isValidateEmail;

//3.是否是空字符串
- (BOOL)isNullStr;

//4.是否是空对象
-(BOOL)isNull;

//5.数字转字符串
+(NSString*) stringFromInteger:(NSInteger)num;

//6.密码是否符合彼标准 8-14位字母数组的组合
-(BOOL)isValidatePwd;


#pragma mark - 功能相关
/* 功能相关 */

//1.md5加密
- (NSString *) md5;

//2.将字符串的首尾空格去掉
- (NSString *) trim;

/* 验证相关  */

//1.是否是手机号
- (BOOL)isMobileNumber{
    NSString * MOBILE = @"^1[3-9]\\d{9}$";
    NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE];
    
    if ([regextestmobile evaluateWithObject:self] == YES) {
        return YES;
    }else{
        return NO;
    }
}

//2.是否是邮箱
-(BOOL)isValidateEmail{
    NSString *emailRegex = @"^([a-z0-9A-Z]+[-_|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:self];
}

//3.是否是空字符串
- (BOOL)isNullStr{
    if ([self isEqualToString:@"<NULL>"]) {
        return YES;
    }else if ([self isEqualToString:@"(null)"]){
        return YES;
    }else if ([self isEqualToString:@"(NULL)"]){
        return YES;
    }else if ([self isEqualToString:@"<null>"]){
        return YES;
    }
    return NO;
    
}

//4.是否是空对象
-(BOOL)isNull{
    // 判断是否为空串
    if ([self isEqual:[NSNull null]]) {
        return YES;
    }
    else if ([self isKindOfClass:[NSNull class]])
    {
        return YES;
    }
    else if (self==nil){
        return YES;
    }
    return NO;
    
}

//5.数字转字符串
+(NSString*) stringFromInteger:(NSInteger)num{
    return [NSString stringWithFormat:@"%ld",num];
}

//6.密码是否符合彼标准 8-14位字母数组的组合
-(BOOL)isValidatePwd{
    NSString *pwdRegex = @"^(?![0-9]+$)(?![a-zA-Z]+$)[0-9A-Za-z]{8,14}$";
    NSPredicate *pwdTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pwdRegex];
    return [pwdTest evaluateWithObject:self];
}




#pragma mark - 功能相关
/* 功能相关 */

//1.md5加密
- (NSString *) md5{
    const char* str = [self UTF8String];
    unsigned char result[CC_MD5_DIGEST_LENGTH];
    CC_MD5(str, (CC_LONG)strlen(str), result);
    
    NSMutableString *ret = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH*2];
    for(int i = 0; i<CC_MD5_DIGEST_LENGTH; i++) {
        [ret appendFormat:@"%02x",result[i]];
    }
    return ret;
}

//2.将字符串的首尾空格去掉
- (NSString *) trim{
    return [self stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}

//验证电话号码
    NSString *phoneNUM = @"17778176004";
    NSLog(@"phoneNUM：%d",[phoneNUM isMobileNumber]);
    
    //邮箱验证
    NSString *emailStr = @"673658917@qq.com";
    NSLog(@"emailStr：%d",[emailStr isValidateEmail]);
    
    
    //md5加密 这个规则需要自己设置 前后台统一就好了
    NSString *md5Str = @"abcdefg";
    NSLog(@"md5Str：%@",[md5Str md5]);
    
    //去掉前后的空格
    NSString *trimStr = @"    1234567890    ";
    NSLog(@"trimStr：%@",[trimStr trim]);
    
    //是否是空字符串
    NSString *nullStr = @"(null)";
    NSLog(@"nullStr:%d",[nullStr isNullStr]);
    
    //是否是空对象 貌似设置为空的时候就掉不起来下边的方法
    NSString *nullObj = nil;
    [nullObj isNull];
    NSLog(@"null:%d",[nullObj isNull]);