How to write the properties for variables in c while converting from objective c

Question

I am porting a project called sneakyness / SneakyInput hosted on github at https://github.com/sneakyness/SneakyInput. It's in objective-c for cocos2d-iphone . I want to port that to c++ for use in cocos2d-x. In SneakyJoystick.h The properties like @property (nonatomic, readonly) CGPoint stickPosition; where CGPoint stickPosition is a variable which is already defined. I have defined this variable normally as CCPoint stickPosition; But I am very confused about the @property (nonatomic, readonly) CGPoint stickPosition; whether I should write it in c++ code or leave it.

Answer 1

If you have code in C++ you can leave it as it is(C++) and interact with it with Objective-C without problems.

If instead your intentions are to rewrite everything to Objective-C then the objective C property should be put in place of a property in C++ :

Property in C++

private: 
    int x; 
public:  
    int getX()
    {
        return x;
    }
    void setX(int value) 
    {
        x = value;
    }   

Property in Objective-C

@property(nonatomic) int x;

@synthesize x;

Keep in mind that the property declaration in Objective-C is splitted into two files : the @property goes into the header file(.h) while the @synthesize goes into the implementation file(.m).

To understand better how @property and @synthesize works take a look at the apple declared properties documentation and/or at this other question .