How to disable the long press gesture of a QLPreviewController

Question

I have a UIView as the main view and add a QLPreviewController as the subview over that while previewing the document. I want to restrict the long press gesture so that no one can copy contents from the document. I have tried the following code:

Code Snippet :

UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:nil]; 

longPress.allowableMovement=100; 

longPress.minimumPressDuration=0.3; 
longPress.delegate=self; 
longPress.delaysTouchesBegan=YES;
longPress.delaysTouchesEnded=YES;

longPress.cancelsTouchesInView=YES; 
[previewController.view addGestureRecognizer:longPress]; 
[self.view addSubview:previewController.view];

But no success. Can anyone tell me where am I going wrong and what could be done to disable the long press gesture ?

I have tried this as well :

NSArray *arr = previewController.view.gestureRecognizers;

for (int i = 0; i < arr.count; i++) {

     if ([[arr objectAtIndex:i] isKindOfClass:[UILongPressGestureRecognizer class]]) {

         [previewController.view removeGestureRecognizer:[arr objectAtIndex:i]];
     }
}

Answer 1

You can do something like,

NSArray *arr = qlPreviewController.gestureRecognizers;

for (int i = 0; i < arr.count; i++) {

    if ([[arr objectAtIndex:i] isKindOfClass:[UILongPressGestureRecognizer class]]) {

        [qlPreviewController removeGestureRecognizer:[arr objectAtIndex:i]];
    }
}

qlPreviewController is the object of QLPreviewController 's view on wich UILongPressGestureRecognizer is there!

qlPreviewController is view not viewcontroller make sure that!

Update :

for example;

  QLPreviewController *vc;  

  UIView *qlPreviewController = vc.view;

Update 2:

you can use this delegate method to disable gesture recognizer!

  - (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{

    return NO;


 }