Unable to convert data to string around character 11.

IOS问题：  2015-08-04 09:05:12.941 EnquiryGreens-v1.0[512:6068] error:Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (Unable to convert data to string around character 11.) UserInfo=0x7fab3e1ad580 {NSDebugDescription=Unable to convert data to string around character 11.}   

解决…………//规定编码格式NSStringEncoding enc = CFStringConvertEncodingT*****StringEncoding(kCFStringEncodingGB_18030_2000);//将有乱码的 NSMutableData类型 mydata 转为规定了格式的NSString 类型 strdataNSString* strdata = [[NSString alloc]initWithData:mydata encoding:enc];//在将NSString类型转为NSDataNSData data = [strdata dataUsingEncoding:NSUTF8StringEncoding];这样解决的乱码问题。