// 消除乱码
static NSString* decodeUndecipherable(NSString* input) {
if (!input) return nil;
const char* cstring = [input cStringUsingEncoding:NSISOLatin1StringEncoding];
if (!cstring) return input;
NSStringEncoding gbkEncoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSString* output = [NSString stringWithCString:cstring encoding:gbkEncoding];
if (!output) return input;
return output;
}
_title = decodeUndecipherable((NSString*)[metaData value]);