遇到XML-GB2312网页编码的处理方法

报的错误：encoding error : input conversion failed due to input error, bytes  I/O error : encoder error

1. 把请求的数据转化成data

2.取XML文件的前40个字节

NSData * xmldata = [self.data subdataWithRange:NSMakeRange(0,40)];

3.以UTF-8编码进行解码

NSString *xmlstr = [[NSString alloc] initWithData:xmldata encoding:NSUTF8StringEncoding];

//搜索GB2312，如果找到，就把GB2312 改成 utf-8 （ps:替换字符串）

if ([xmlstr rangeOfString:@"\"GB2312\"" options:NSCaseInsensitiveSearch].location != NSNotFound)

{

NSLog(@"遇到：GB2312 encoding founded.正在把GB2312改成utf-8");

NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

NSString *utf8str = [[NSString alloc] initWithData:self.data encoding:enc];

utf8str = [utf8str stringByReplacingOccurrencesOfString:@"\"GB2312\"" withString:@"\"utf-8\"" options:NSCaseInsensitiveSearch range:NSMakeRange(0,40)];

//新的数据,可以进行正常解析

NSData *newData = [utf8str dataUsingEncoding:NSUTF8StringEncoding];

　　

}

原文地址：http://www.linuxidc.com/Linux/2012-02/55254.htm