How to covert std::string to NSString?Look at the last picture - ios

Question

How to covert std::string to NSString? ,why the result is garbled?I use lldb command po ,look at the console ，the red arrow,the _data display correct string？Why?
std::string resultString = getResult();
NSString *str= [NSString stringWithCString:resultString.c_str() encoding:NSUTF8StringEncoding];
but the str is garbled,like

Answer 1

May be here issue is with string encoding. I have done little test on this input string and found some result on that.
Here I have use complex string "\x18\xa4\tp\x01" which you shown in your log. From the result I conclude that NSUTF8StringEncoding encoding string is not working with above string.
Here is code:
+ (void) stringTest {
std::string *resultString = new std::string("\x18\xa4\tp\x01");
NSString *str= [NSString stringWithCString:resultString->c_str() encoding:NSUTF8StringEncoding];
NSString *str2= [NSString stringWithCString:resultString->c_str() encoding:NSASCIIStringEncoding];
NSString *str3= [NSString stringWithCString:resultString->c_str() encoding:[NSString defaultCStringEncoding]];
NSLog(#"str :%#",str);
NSLog(#"str2 :%#",str2);
NSLog(#"str3 :%#",str3);
}
And a reference image for log:
Here you can see that NSUTF8StringEncoding returns nil string and other encoding gives a result. I'm not sure which encoding scheme is valid for your string. If we know that encoding scheme for resultString string then we can get more accurate result here.