iOS判断字符串是否包含表情字符

 - (BOOL)isContainsEmoji:(NSString *)string {
     __block BOOL isEomji = NO;
     [string enumerateSubstringsInRange:NSMakeRange(, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:
      ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
          const unichar hs = [substring characterAtIndex:];
          if (0xd800 <= hs && hs <= 0xdbff) {
              if (substring.length > ) {
                  const unichar ls = [substring characterAtIndex:];
                  const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                  if (0x1d000 <= uc && uc <= 0x1f77f) {
                      isEomji = YES;
                  }
              }
          } else if (substring.length > ) {
              const unichar ls = [substring characterAtIndex:];
              if (ls == 0x20e3 || ls == 0xfe0f) {
                  isEomji = YES;
              }
          } else {
              if (0x2100 <= hs && hs <= 0x27ff && hs != 0x263b) {
                  isEomji = YES;
              } else if (0x2B05 <= hs && hs <= 0x2b07) {
                  isEomji = YES;
              } else if (0x2934 <= hs && hs <= 0x2935) {
                  isEomji = YES;
              } else if (0x3297 <= hs && hs <= 0x3299) {
                  isEomji = YES;
              } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50|| hs == 0x231a ) {
                  isEomji = YES;
              }
          }
      }];
     return isEomji;
 }