Question: I need to block the interface until the `MBProgressHUD` operation is done. I did refer this thread,

[Block interface until operation is done](https://stackoverflow.com/questions/8628981/block-interface-untill-operation-is-done)

According to it, we should disable each individual item which wont work for me. My case is I need to disable user from clicking back button. I did try `HUD.userInteractionEnabled = YES` which disable every controller except the back button. Is there any way of blocking user from popping out from that controller?

Regards,  

Dilshan

Answer: 
if u dont find a proper way to do that, you can ignore the whole user interaction by

```
[[UIApplication sharedApplication] beginIgnoringInteractionEvents];

```

.U can stop this by

```
[[UIApplication sharedApplication] endIgnoringInteractionEvents];

```
You can add the MBProgressHUD to the navigation controller's view so that it also prevents interaction with the back button:

```
[MBProgressHUD showHUDAddedTo:self.navigationController.view animated:YES];

```