IOS类似新浪微博统计汉字/英文/标点符号等字符长度

-(NSUInteger) unicodeLengthOfString: (NSString *) text

{

   NSUInteger asciiLength = 0;

   

   for (NSUInteger i = 0; i < text.length; i++) {

       unichar uc = [text characterAtIndex: i];

       asciiLength += isascii(uc) ? 1 : 2;

   }

   

   NSUInteger unicodeLength = asciiLength / 2;

   

   if(asciiLength % 2) {

       unicodeLength++;

   }

   return unicodeLength;

}

即：ASCII和Unicode混合文本长度

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