cocoa异步请求 and libxml2.dylib(13)

change:(NSDictionary *)change

context:(void *)context

{

if ([keyPath isEqual:@"isFinished"]) {

BOOL isFinished=[[change

objectForKey:NSKeyValueChangeNewKey] intValue];

if (isFinished) {//如果服务器数据接收完毕

[indicatorView stopAnimating];

URLOperation* ctx=(URLOperation*)context;

NSStringEncoding

enc=CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

NSLog(@"%@",[[NSString alloc] initWithData:[ctx data] encoding:enc]);

//取消kvo注册

[ctx removeObserver:self

forKeyPath:@"isFinished"];

}

}else{

// be sure to call the super implementation