之前做弹幕的时候 遇到的表情编码解码问题

  //编码

    NSString *uniStr = [NSString stringWithUTF8String:[_barrageText.text UTF8String]];

    NSData *uniData = [uniStr dataUsingEncoding:NSNonLossyASCIIStringEncoding];

    NSString *goodStr = [[NSString alloc] initWithData:uniData encoding:NSUTF8StringEncoding] ;

    NSLog(@"---编码--->[%@]",goodStr);

    //解码

    const char *jsonString = [goodStr UTF8String];   // goodStr 服务器返回的 json

    NSData *jsonData = [NSData dataWithBytes:jsonString length:strlen(jsonString)];

    NSString *goodMsg1 = [[NSString alloc] initWithData:jsonData encoding:NSNonLossyASCIIStringEncoding];

    NSLog(@"---解码--->[%@]",goodMsg1);

    -- ::17.858 DFRomwe[:] ---编码--->[hello\ud83d\ude18\ud83d\ude18world\u4e16\u754chaha\ud83d\ude17]

    -- ::17.859 DFRomwe[:] ---解码--->[hello