const char* cppString to NSString not working if it contains smiles

Question

I have cpp const char* string which contains "💕😀😁 playlist" characters. I am trying to convert it into NSString and I am getting "@(NULL)" string.

Following are my steps to convert it.

 string cppString = "💕😀😁 playlist"; //Cpp data type

I have one method where I am passing my cpp string like

NSString *str = [self charStringToString:cppString.c_str()];

and the method returns NSString object after some operations:

+ (NSString *)charStringToString:(const char*)cppStringConst { if ( cppStringConst == NULL || cppStringConst == nullptr ) { return @""; } NSString *outputString = [NSString stringWithFormat:@"%@", [NSString stringWithUTF8String:cppStringConst]]; if ( [outputString isEqualToString:@"(null)"] == YES ) { //it should not come here if I am passing 💕😀😁 playlist return @""; } return outputString; }

Could anyone resolve my problem??

This does not look like C code at all...possibly tagged incorrectly? — Chris Turner
– Chris Turner, Commented Dec 8, 2017 at 11:24
Yes @ChrisTunner, I am trying to convert Cpp code(String) into Objective-C. — Sarat Patel
– Sarat Patel, Commented Dec 8, 2017 at 11:26
Are you sure that your cppString contains a valid UTF8 encoding? — mschmidt
– mschmidt, Commented Dec 8, 2017 at 13:03

Craig · Accepted Answer · 2017-12-08 17:26:33Z

0

Take a look at this answer to a similar question. I'm suspicious of the encoding being used in your const char * string.

answered Dec 8, 2017 at 17:26

Craig

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