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pod 'PopUpLib'

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PopupStoreController *controller =  [[PopupStoreController alloc]
                                    initWithImage:[UIImage imageNamed:@"your_descired_image.jpg"]
                                    applicationKey:YOUR_PARTNER_KEY
                                    delegate:self];

if (controller) {
    [self presentViewController:controller animated:YES completion:NULL];

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- (void)popupStoreLibWasOpened:(PopupStoreController *)lib
{
    /*
    * Here a user has opened the Pop-up Store controller successfully
    */
    NSLog(@"Pop-up Store lib was opened");
}

- (void)popupStoreLibUserTappedContinue:(PopupStoreController *)lib
{

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- (void)popupStoreLibWasClosed:(PopupStoreController *)lib
{
    /*
    * Here a user has closed the Pop-up Store controller and it must be dismissed
    */
    [self dismissViewControllerAnimated:YES completion:nil];
}

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objective-c @interface ViewController : UIViewController <PopupStoreControllerDelegate> { }