NSString與NSData

NSString*strTest =@"1 2 3 4 5 6 7 8 9 0 11 12 13 14 15 16 17 18 19 20";

NSData*data = [strTestdataUsingEncoding:NSUTF8StringEncoding];

若使用以下語句

NSString *strTmp = [NSdata description];

strTmp與strTest將會(huì)不同，想要還原的話還是需要用NSUTF8StringEncoding

NSString*str =[[NSStringalloc]initWithData:dataencoding:NSUTF8StringEncoding];

NSString 與Byte