UINavigationController interactivePopGestureRecognizer working abnormal in iOS7

Question

In iOS7, we have a new \"swipe left to right\" gesture, this is a very useful feature, but now I have a problem with it.

I use this code to custom the back button in

Answer 1

Add in Class Controller "UIGestureRecognizerDelegate"

in ViewDidApper add

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    self.navigationController?.interactivePopGestureRecognizer.delegate =  self
}

=)