ios 端如何解码 Unicode

Question

ios 端如何 进行同样的unicode 解码 转码， 不太懂Java，希望大神贴上ios unicode代码转码解码

public static String string2Unicode(String string) {

 
    StringBuffer unicode = new StringBuffer();
    for (int i = 0; i < string.length(); i++) {
        char c = string.charAt(i);
        unicode.append("\\u" + Integer.toHexString(c));
    }
    String str = unicode.toString();
  
    return str.replaceAll("\\\\","0x");
}

public static String unicode2String(String unicode) {
    
    String str = unicode.replace("0x", "\\");        
    
    StringBuffer string = new StringBuffer();
    String[] hex = str.split("\\\\u");
    for (int i = 1; i < hex.length; i++) {
        int data = Integer.parseInt(hex[i], 16);
        string.append((char) data);
    }
    return string.toString();
}    

Answer 1

如果你是在用 obj c 的话，你可以看看 NSString 的文档，大概就是下面两个方法， string 的编码和解码：

- (nullable instancetype)initWithData:(NSData *)data encoding:(NSStringEncoding)encoding;

- (nullable NSData *)dataUsingEncoding:(NSStringEncoding)encoding;

Answer 2

• (NSString )decodeWithUnicode:(NSString )description;
  {
  description = [description stringByReplacingOccurrencesOfString:@"0x" withString:@"\\"];
  NSString *tempstr = [NSString string];
  NSArray *studyy =[description componentsSeparatedByString:@"\\u"];
  for (NSString *temp in studyy) {

     if (temp.length  == 4) {
         tempstr = [tempstr stringByAppendingString:temp];
     }

  }
  tempstr = [tempstr stringByReplacingOccurrencesOfString:@" " withString:@""];

  NSMutableData *commandToSend= [[NSMutableData alloc] init];

  unsigned char whole_byte;

  char byte_chars[3] = {'0','0','0'};

  int i;

  for (i=0; i < [tempstr length]/2; i++) {

     
     byte_chars[0] = [tempstr characterAtIndex:i*2];
     
     byte_chars[1] = [tempstr characterAtIndex:i*2+1];
     
     whole_byte = strtol(byte_chars, NULL, 16);
     
     [commandToSend appendBytes:&whole_byte length:1];
     

  }

  NSString *unicodeDes = [[NSString alloc]initWithData:commandToSend encoding:(NSUTF16StringEncoding)];
  return unicodeDes;
  }

@end