在Java中可以这样获取可用编码:
SortedMap<String, Charset> availableCharsets = Charset.availableCharsets();
Vector allEncodes = new Vector();
for (Map.Entry<String, Charset> entry : availableCharsets.entrySet()) {
allEncodes.add(entry.getKey());
}
然后这样读取文件:
Reader in = new InputStreamReader(new FileInputStream(aPath), allEncodes.get(0) );
那么在objective-c中怎么实现类似的功能?