How to choose the right UIGestureRecognizer? - ios

Question

I have view controller which as UIPageViewController inside.
Using pageviewcontroller I can swipt left, right in order to go to other VCs. It works!
So, after I added sideBarMenu. When adding this menu I use this code to add gesture recognizer:
var menuViewController: UIViewController! {
didSet {
self.exitPanGesture = UIPanGestureRecognizer()
self.exitPanGesture.addTarget(self, action:"handleOffstagePan:")
self.sourceViewController.view.addGestureRecognizer(self.exitPanGesture)
}
Here the sourceViewController is my original VC.
The problem is when I try to swipe (in order to close menu), the pageViewController swipe works.
I want to disable pageViewController swipe and enable new swipe function when menu is opened. And do oppositely when menu is closed.
Additional code:
func handleOffstagePan(pan: UIPanGestureRecognizer){
println("dismiss pan gesture recognizer")
let translation = pan.translationInView(pan.view!)
let d = translation.x / CGRectGetWidth(pan.view!.bounds) * -0.5
switch (pan.state) {
case UIGestureRecognizerState.Began:
self.interactive = true
self.menuViewController.performSegueWithIdentifier("dismisMenu", sender: self)
break
case UIGestureRecognizerState.Changed:
self.updateInteractiveTransition(d)
break
default:
self.interactive = false
if d > 0.1 {
self.finishInteractiveTransition()
}else {
isMenuVisible = false
self.cancelInteractiveTransition()
}
}
}

Answer 1

Guys!
SO, the solution is instead of setting PageViewController to the sourceVC of your TransitionManager, set pageContentViewController to the sourceVC. PageContentViewControler is :
func resetToMainPage(index: Int!) {
/* Getting the page View controller */
mainPageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("MainPageViewController") as UIPageViewController
self.mainPageViewController.dataSource = self
self.mainPageViewController.delegate = self
let pageContentViewController = self.viewControllerAtIndex(index)
self.transtionManger.sourceViewController = pageContentViewController // adding swipe to the pageContentViewControlle in order to close menu
self.mainPageViewController.setViewControllers([pageContentViewController!], direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)
self.mainPageViewController.view.frame = CGRectMake(0, 102, self.view.frame.width, self.view.frame.height)
self.addChildViewController(mainPageViewController)
self.view.addSubview(mainPageViewController.view)
self.mainPageViewController.didMoveToParentViewController(self)
}
Here I set pageContentVC to the sourveVS of transitionManageClass. NExt how to choose the right GestureRecognizer. By default when you add new gesture recognizer the old one doesnt work. When you disable the new gesture recognizer the old one starts to work! I added new gesture recognizer using code:
var menuViewController: UIViewController! {
didSet {
self.exitPanGesture = UIPanGestureRecognizer()
self.exitPanGesture.addTarget(self, action:"handleOffstagePan:")
// self.exitPanGesture.view?.userInteractionEnabled = false
self.sourceViewController.view.addGestureRecognizer(self.exitPanGesture)
}
}
Before setting menuViewController I set sourceViewController. So, here I am adding new gesture recognizer to my sourceViewController. Next, step is to disable this gesture recognize. When you close the menu disable it using this code:
var presentingP:Bool!{
didSet{
if presentingP == true {
// enable the gesture recognizer only when the view of menucontroller is presented
self.exitPanGesture.view?.userInteractionEnabled = true
}else{
// disable gesture recognizer when menu is not presented
self.exitPanGesture.view?.userInteractionEnabled = false
isMenuVisible = false
}
}
}
PresentingP is boolean value which shows when menu is opened and closed!