[SOLVED]Using objective-c class in qt c++

[hasti66]

Hi,
i want to implement an ios application with qt. I’ve installed qt on mac and i want to use objective-c code in qt c++. to fetch iphone address book, then i want to use it in qt c++

For use objective-c class in qt c++, I’ve used the code from this link: http://stackoverflow.com/questions/1061005/calling-objective-c-method-from-c-method

//mainwindow.h public:
int MyObjectDoSomethingWith(void *myObjectInstance, void *parameter);
void someMethod(void *myObjectInstance, void *parameter);

//MyObject.h
#import <Foundation/Foundation.h>

@interface MyObject : NSObject

// The Objective-C member function you want to call from C++ – (int) doSomethingWith:(void *) aParameter;

@end

//mainwindow.cpp
void MainWindow::someMethod(void *objectiveCObject , void *aParameter)
{ int ret = MyObjectDoSomethingWith(objectiveCObject ,aParameter )
}

//MyObject.mm
#import “MyObject.h”

@implementation MyObject

// C “trampoline” function to invoke Objective-C method
int MyObjectDoSomethingWith (void *self, void *aParameter)
{ // Call the Objective-C method using Objective-C syntax return [(id) self doSomethingWith:aParameter];
}

• (int) doSomethingWith:(void *) aParameter
  { // The Objective-C function you wanted to call from C++. // do work here.. return 21 ; // half of 42
  }
  @end

//.pro
OBJECTIVE_SOURCES += MyObject.mm
LIBS += -framework Foundation
…

Afetr building, i got these errors:
symbol(s) not found for architecture x86_64
linker command failed with exit code 1 (use -v to see invocation)

I use qt5.3 on mac, please help me.

[hasti66]

I found a solution.

1- In QT header file, call a cpp method like:
int MyCPPMethod(void *self, void * aParam)

2- Implement the method in .mm file (objective c file)

like this:

//.mm file
@interface MyObject :NSObject
{
...
}
-(int)doSomethingWith:(void *) aParam;
@end

@implementation MyObject

int MainWindow::MyCPPMethod(void *self, void * aParam)
{
self = [[MyObject alloc] init];
return [(id) self doSomethingWith:aParam];
}

-(int)doSomethingWith:(void *) aParam
{
NSLog(@"Result: %d" , 21);
return 21;
}
@end

Good Luck :)

[jman]

Is there a way to block the xCode if you don't download to a Mac? It won't compile on the developer machines that are using windows.

-Jordan

[benlau]

@jman Check my example project. It could be built on other platform:

quickios/examples/quickiosexample at master · benlau/quickios

Method:

1. Place those .mm files in "ios {}" block in your .pro file

quickios/quickiosexample.pro at master · benlau/quickios

2. Use "#ifdef Q_OS_IOS..#endif" block in C++ code or use the SystemMessenger class from my project:

Example:
quickios/qisystemutils.mm at master · benlau/quickios