在下面的方法中，我想檢查一個UITextField文本如果：它包含一個或多個英文單詞，以及一個或多個數字並讓其中包含特殊字符（！@ $ &＃）返回true，否則返回false。ios中的正則表達式（一個字母和特殊字符）

#define pattern @"^[a-zA-Z0-9\\u0021\\u0040\\u0023\\u0024\\u0026]{1}*$" 

- (BOOL)stringHasCorrectFormat:(NSString *)str { 

     if ([str componentsSeparatedByString:SPACE].count > 1) 
     return NO; 
     NSString *regularPattern = EMPTY_STRING; 
     regularPattern = [regularPattern stringByAppendingString:pattern] 
     NSRegularExpression *regex = [NSRegularExpression 
           regularExpressionWithPattern:regularPattern 
           options:NSRegularExpressionCaseInsensitive 
           error:nil]; 



     NSTextCheckingResult *match = [regex 
           firstMatchInString:str 
           options:0 
           range:NSMakeRange(0, [str length])]; 


    if (match != nil) { 
     return YES; 
    } 

    return NO; 
}

感謝

2016-05-28 Mor4eza

你有什麼問題？你只需要顯示文字或數字？ –

你實際上不允許有0個或更多的符號。使用'@「^ [a-zA-Z0-9 \\ u0021 \\ u0040 \\ u0023 \\\\\\\\\\\ * * * * *''。如果你想確保有一個字母和一個數字，使用'@「^（？= [^ a-zA-Z] * [a-zA-Z]）（？= \\ D * \\ d） [A-ZA-Z0-9 \\ u0021 \\ u0040 \\ u0023 \\ u0024 \\ u0026] * $「' –

說明

^(?=.*[a-z])(?=.*[0-9])[[email protected]$&#]*$

Regular expression visualization

這個正則表達式將執行以下操作：

(?=.*[a-z])要求日E弦到包含至少一個a-z字符
(?=.*[0-9])需要對包含至少一個0-9字符
[[email protected]$&#]*$允許進行字符串最多隻有a-z字符，0-9字符和[email protected]$&#符號

的串

示例

實時演示

https://regex101.com/r/mC3kL3/1

說明

NODE      EXPLANATION 
---------------------------------------------------------------------- 
^      the beginning of a "line" 
---------------------------------------------------------------------- 
    (?=      look ahead to see if there is: 
---------------------------------------------------------------------- 
    .*      any character except \n (0 or more times 
          (matching the most amount possible)) 
---------------------------------------------------------------------- 
    [a-z]     any character of: 'a' to 'z' 
---------------------------------------------------------------------- 
)      end of look-ahead 
---------------------------------------------------------------------- 
    (?=      look ahead to see if there is: 
---------------------------------------------------------------------- 
    .*      any character except \n (0 or more times 
          (matching the most amount possible)) 
---------------------------------------------------------------------- 
    [0-9]     any character of: '0' to '9' 
---------------------------------------------------------------------- 
)      end of look-ahead 
---------------------------------------------------------------------- 
    [a-z0-9!&#]*    any character of: 'a' to 'z', '0' to '9', 
          '!', '&', '#' (0 or more times (matching 
          the most amount possible)) 
---------------------------------------------------------------------- 
    $      before an optional \n, and the end of a 
          "line" 
----------------------------------------------------------------------

來源

2016-05-28 14:10:20

ios中的正則表達式（一個字母和特殊字符）

回答

說明

示例

說明

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