Mix QT with objective-c to develope an ios application

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++. how can i do that? how can i embed objective-c code in qt c++? are there a way like androidextra for ios?

hasti66

I found a solution : http://qt-project.org/forums/viewthread/40299

"Create a C++ header that contains the function you’ll use to invoke the native file selection dialog.

Then write a mm file that implements the function calling the Objective-C classes/code you need.

Add the mm file to the OBJECTIVE_SOURCES variable."

SGaist

Hi,

You can also take a look at Qt's code to see example on how to do that cleanly

hasti66

Hi,
Thanks
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. Please go to : http://qt-project.org/forums/viewthread/48250/