C++ / Objective-C++ - How can I store a C++ variable in an NSDictionary?
c++, dictionary, objective-c, vector
Solution
Actually `NSValue` seems to be the solution. @Taum's advice is correct for some cases (when you store your objects somewhere and sure your pointers are working). In case you've created some object and it's lifetime is limited, but you need to push this object further, use another `NSValue` method
std::vector<std::bitset<128>> cppVector;
NSValue *value=[NSValue valueWithBytes:&cppVector objCType:@encode(std::vector<std::bitset<128>>)];
When you need to get this value back:
std::vector<std::bitset<128>> cppVector;
[value getValue:&cppVector];
That works perfectly for simple structs too.
Problem
I have a `C++` variable of type `std::vector<std::bitset<128> >` which is defined and populated in a `C++` class (which is called from my `Objective-C++` class.) I would like to store this object in an `NSDictionary` - or some equivalent of. I clearly can't simply add the `std::vector<std::bitset<128> >` to the NSDictionary because it's not of type `id`. So my question is this: how can I achieve the same concept? How can I store a `std::vector<std::bitset<128> >` in a dictionary of sorts? Can I wrap the vector object in an `id` type somehow? Even if it's not a direct dictionary, is there another method I could use? I also need this to be mutable, so I can add key/object's at runtime. I'v seen `std::map<std::string, std::string>`, but I'm not sure if it's what I'm looking for. Nor have I found any examples on it being mutable. Does anyone have any idea how to achieve this?