讀取的中文網頁編碼集是gb2312,進行如下轉換可正常顯示中文:
NSString *urlStr="your url";
NSURL *url = [NSURL URLWithString:urlStr];
NSData *data = [NSData dataWithContentsOfURL:url];
NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSString *retStr = [[NSString alloc] initWithData:data encoding:enc];