Implementing side menu for iOS App, app crashing on gestures to present.

Question

I am trying to implement side menu for my iOS app, using this library https://github.com/jonkykong/SideMenu By code implementation, below the code written in view did load func:

    let menuRightNavigationController = UISideMenuNavigationController(rootViewController: SideMenuViewController())

    SideMenuManager.default.menuRightNavigationController = menuRightNavigationController
    SideMenuManager.default.menuFadeStatusBar = false

    SideMenuManager.default.menuAddPanGestureToPresent(toView: self.navigationController!.navigationBar)
    SideMenuManager.default.menuAddScreenEdgePanGesturesToPresent(toView: self.navigationController!.view)

But the Application is crashing on last two lines of the above code, and the below code written in button action:

    @objc func menuButtonAction(sender: UIButton!) {
    present(SideMenuManager.default.menuRightNavigationController!, animated: true, completion: nil)    
}

Guys please help to handle the crashing so I can present my side menu. Thanks!

Is your application embed with navigation controller? – karthikeyan Jun 18 '18 at 11:45 — karthikeyan, Jun 18 '18 at 11:45

score 0 · Accepted Answer · answered Jun 18 '18 at 11:45

I'm pretty sure your app crashes when it runs into nil value in this line: SideMenuManager.default.menuAddPanGestureToPresent(toView: self.navigationController!.navigationBar), however without a crash log I can only make some assumptions.

I am assuming the self here refers to UIViewController class. According to documentation the navigationController property is The nearest ancestor in the view controller hierarchy that is a navigation controller. This property is nil if the view controller is not embedded inside a navigation controller.

I would recommend you to make sure you initiate the UINavigationController object before you force-unwrap it. Here is useful documentation link, which may help you get the concept of navigation controller.

Thanks, I have embed in Navigation controller to my view controller. — Huzaifa ameen, Jun 18 '18 at 12:27

score 0 · Answer 2 · answered Mar 19 '19 at 00:09

0

You need to change your a line of code from this

SideMenuManager.default.menuAddPanGestureToPresent(toView: self.navigationController!.navigationBar)

to this

SideMenuManager.default.menuAddPanGestureToPresent(toView: self.view)

answered Mar 19 '19 at 00:09

Helogale

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Implementing side menu for iOS App, app crashing on gestures to present.

2 Answers2