NSData到NSString转换问题!

Question

我得到一个HTML文件作为NSData,需要解析它以提取一些信息.我的方法是使用UTF8编码将其转换为NSString(html具有非英文字符,例如俄语) - 它失败了.我用过这样的东西:

NSString *respData = [NSString stringWithUTF8String:[theData bytes]];

但它返回零.

唯一真正奏效的是

[NSString stringWithCString:[theData bytes] length:[theData length]];

但是当它遇到俄罗斯人物时,例如它会返回jibrish.

然后我的下一个方法是解析数据的字节数组,提取我需要的字节,并以某种方式将它们转换为NSString.我试过这样的事情:

-(NSString *)UTF8StringFromData:(NSData *)theData{
 Byte *arr = [theData bytes];
 NSUInteger begin1 = [self findIndexOf:@"<li>" bArr:arr size:[theData length]]+4;
 NSUInteger end1 = [self findIndexOf:@"</li></ol>" bArr:arr size:[theData length]];
 Byte *arr1 = (Byte *)malloc(sizeof(Byte)*((end1-begin1+1)));
 int j = 0;
 for (int i = begin1; i < end1; i++){
  arr1[j] = arr[i];
  j++;
 }
 arr1[j]='\0';
 NSData *temp = [NSData dataWithBytes:arr1 length:j];
 return [[NSString alloc] initWithData:temp encoding:NSUTF8StringEncoding];
}

Answer 1

假设您有NSURLResponse*响应和NSData*数据:

CFStringEncoding cfEncoding = CFStringConvertIANACharSetNameToEncoding((CFStringRef) [response textEncodingName]);
NSStringEncoding encoding = CFStringConvertEncodingToNSStringEncoding(cfEncoding);

NSString* string = [[NSString alloc] initWithData:data encoding:encoding];

// Do stuff here..

[string release];

Answer 2

首先这是我的代码

-(NSString *)UTF8StringFromData:(NSData *)theData{
    Byte *arr = [theData bytes];
    NSUInteger begin1 = [self findIndexOf:@"<li>" bArr:arr size:[theData length]]+4;
    NSUInteger end1 = [self findIndexOf:@"</li></ol>" bArr:arr size:[theData length]];
    Byte *arr1 = (Byte *)malloc(sizeof(Byte)*((end1-begin1+1)));
    int j = 0;
    for (int i = begin1; i < end1; i++){
        arr1[j] = arr[i];
        j++;
    }
    arr1[j]='\0';
    NSData *temp = [NSData dataWithBytes:arr1 length:j];
    return [[NSString alloc] initWithData:temp encoding:NSUTF8StringEncoding];  
}

其次 - 我从网络上获取文件内容 - 所以我不能确定任何事情。这是谷歌翻译的html，如果有帮助的话......