禁止单个uiviewController 右滑退出

//禁止单个uiviewController 右滑退出

id target = self.navigationController.interactivePopGestureRecognizer.delegate;
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:target action:nil];
    [self.view addGestureRecognizer:pan];