引言

【上篇】https://blog.csdn.net/z929118967/article/details/115505524

I 应用案例

1.1 商品分类名称

仅支持数字、字母、中文、斜杠\、横杠",且不能以符号开头

“-”这个连接符需要转义-,否则报如下的错误

 thread 1: "Can't do regex matching, reason: Can't open pattern U_REGEX_MISSING_CLOSE_BRACKET (string U, pattern ^[0-9a-zA-Z一-龥][0-9a-zA-Z一-龥-\\]{0,}$, case 0, canon 0)"

OC正确的写法：
\\\ 表示斜杠\ 转义符

\- 代表横杆- 连接符

+ (BOOL)checkProductClassName: (NSString *) name
{
    NSString *pattern = @"^[0-9a-zA-Z\u4E00-\u9FA5][0-9a-zA-Z\u4E00-\u9FA5\\\\-]{0,}$";//
    NSLog(@"KN-pattern:%@",pattern);//2022-07-22 11:01:26.641648+0800 retail[5321:1883667] KN-pattern:^[0-9a-zA-Z一-龥][0-9a-zA-Z一-龥\\-]{0,}$
    
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:name];
    return isMatch;
      
}

js的写法：

  pattern: /^[0-9a-zA-Z\u4E00-\u9FA5][0-9a-zA-Z\u4E00-\u9FA5-\\]{0,}$/,

1.2 基本校验例子

正则匹配用户密码6-16位数字和字母组合

+ (BOOL)checkPassword:(NSString *) password
{
    NSString *pattern = @"^(?![0-9]+$)(?![a-zA-Z]+$)[a-zA-Z0-9]{6,16}";
    
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    
    BOOL isMatch = [pred evaluateWithObject:password];
    return isMatch;
      
}

正则匹配手机号

+ (BOOL)checkTelNumber:(NSString *) telNumber
{
    NSString *pattern = @"^1+[3578]+\\d{9}";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:telNumber];
    return isMatch;
}
  
  
 #pragma 正则匹员工号,12位的数字
+ (BOOL)checkEmployeeNumber : (NSString *) number
{
    NSString *pattern = @"^[0-9]{12}";
      
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:number];
    return isMatch;
      
}

正则匹配用户姓名,20位的中文或英文

+ (BOOL)checkUserName : (NSString *) userName
{
    NSString *pattern = @"^[a-zA-Z\u4E00-\u9FA5]{1,20}";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:userName];
    return isMatch;
      
}
  
  
#pragma 正则匹配用户身份证号15或18位
+ (BOOL)checkUserIdCard: (NSString *) idCard
{
    NSString *pattern = @"(^[0-9]{15}$)|([0-9]{17}([0-9]|X)$)";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:idCard];
    return isMatch;
}
  
  

正则匹配URL

+ (BOOL)checkURL : (NSString *) url
{
    NSString *pattern = @"^[0-9A-Za-z]{1,50}";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:url];
    return isMatch;
      
}

1.3 限制UITextField只能输入金额

+ (BOOL)isAmoutshouldChangeCharactersInRange:(NSString*)str{
    //匹配以0开头的数字
    NSPredicate * predicate0 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",@"^[0][0-9]+$"];
    //匹配两位小数、整数
    NSPredicate * predicate1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",@"^(([1-9]{1}[0-9]*|[0])\.?[0-9]{0,2})$"];
    return ![predicate0 evaluateWithObject:str] && [predicate1 evaluateWithObject:str] ? YES : NO;
    
}


/**
 限制UITextField只能输入金额的正则表达式
 @param textField <#textField description#>
 @param range <#range description#>
 @param string <#string description#>
 @return <#return value description#>
 */
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{

    
        NSInteger len = range.length > 0?([textField.text length] - range.length): ([textField.text length] + [string length]);
    
        if(len > 20){
            return false;
        }
    ////
    NSString * str = [NSString stringWithFormat:@"%@%@",textField.text,string];

    return [QCT_Common isAmoutshouldChangeCharactersInRange:str];
    
    
    
    
}

1.4 Url格式校验

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

• 用法举例：自定义NSURLProtocol， 决定请求是否需要当前协议对象处理

/**
 决定请求是否需要当前协议对象处理

*/
+(BOOL)canInitWithRequest:(NSURLRequest *)request{
    
    if ([NSURLProtocol propertyForKey:protocolKey inRequest:request]) {
        return NO;
    }
    NSString * url = request.URL.absoluteString;
    return [self isUrl:url];
}

1.5 判断字符串是否为IP地址

/**
 * 判断字符串是否为IP地址
 * param iPAddress IP地址字符串
 * return BOOL 是返回YES，否返回NO
 */
+ (BOOL)isIPAddress:(NSString *)iPAddress{
    NSString *pattern = @"^(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5]).(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5]).(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5]).(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])$";
    return [self isText:iPAddress pattern:pattern];
    
}

+ (BOOL)isText:(NSString *)text pattern:(NSString *)pattern{
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",pattern];
    return [predicate evaluateWithObject:text];
}

1.6 商品条码仅支持数字、字母、下划线_、中划线-

/**
 仅支持数字、字母、下划线_、中划线-
 */
+ (BOOL)checkProductCodeName: (NSString *) name
{
    NSString *pattern = @"^[0-9a-zA-Z\\_\\-]{0,}$";
    NSLog(@"KN-pattern:%@",pattern);
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:name];
    return isMatch;
    
}

用法

            
                if(![QCT_Common checkProductCodeName:self.viewModel.commodity_barcodeModel.content]){
                    
                    return [self showHUDMessage:@"商品条码仅支持数字、字母、下划线_、中划线-"];
            
            
                }
        
            

1.7 正则表达式的一些元字符

II 从数组搜索特定条件的元素

从数组中筛选type=8的电子签名数据，避免遍历数组 certificateInfoList

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版权声明：本文为CSDN博主「#公众号：iOS逆向」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接： https://blog.csdn.net/z929118967/article/details/113499172

see also

gzh：iOS逆向