openFrameworks iOS share window creation

ofxiOSImageSharer.h

//
//  ofxiOSImageSharer.h
//  Created by Brett Renfer on 9/9/14.
//

#pragma once
#import <UIKit/UIKit.h>
#include "ofMain.h"

@class ofxiOSViewController;

@interface ofxiOSInteractionController : NSObject<UIDocumentInteractionControllerDelegate>

@property (nonatomic, retain) ofxiOSViewController * viewController;

- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller;

@end

class ofxiOSImageSharer
{
public:
    
    void createShareWindow( string & url );
    
};

ofxiOSImageSharer.mm

//
//  ofxiOSImageSharer.mm
//
//  Created by Brett Renfer on 9/9/14.
//

#include "ofxiOSImageSharer.h"
#import "ofxiOSViewController.h"
#import "ofxiOSExtras.h"

@interface ofxiOSInteractionController() <UIDocumentInteractionControllerDelegate> {
}
@end

@implementation ofxiOSInteractionController


- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller {
    return ofxiOSGetViewController();
}

@end

void ofxiOSImageSharer::createShareWindow(string & url)
{
    @try {
        ofLogWarning()<<"Creating delegate "<<url;
        UIDocumentInteractionController * controller = [UIDocumentInteractionController interactionControllerWithURL:[NSURL URLWithString:[NSString stringWithUTF8String:url.c_str()]]];
        ofxiOSInteractionController * delegate = [ofxiOSInteractionController alloc];
        controller.delegate = delegate;
        
        [controller presentOptionsMenuFromRect:CGRectZero inView:ofxiOSGetGLParentView() animated:YES];
    }
    
    @catch ( NSException *e ) {
        NSLog(@"catching %@ reason %@", [e name], [e reason]);
    }
}