Panels is a framework to easily add sliding panels to your application

I have created a Panel and when it is called I call the show function on the panel. Everything works fine here.

lazy var panelManager = Panels(target: self)
let panel = UIStoryboard.instantiatePanel(identifier: "Timer")
var panelConfiguration = PanelConfiguration(size: .custom(230))
panelConfiguration.animateEntry = true
panelConfiguration.useSafeArea = false
panelConfiguration.respondToDrag = true
panelConfiguration.respondToTap = false
self.panelManager.show(panel: panel, config: panelConfiguration)

My issue arrises when I try to dismiss the panel using the panelManager. self.panelManager.dismiss() I'm calling the dismiss function when I Post to NotificationCenter that the timer was stopped. I'm using the PanelNotification to see when it is presented to begin observing when the timer will be stopped.

    func panelDidPresented() {
        isPannelOpen = true
        panelDismissed = false
        NotificationCenter.default.post(name: .CurrentSession, object: nil, userInfo: ["sessionInterval": sessionInterval,
                                                                                       "sessionClientName": sessionClientName])
        NotificationCenter.default.addObserver(self, selector: #selector(timeLeft(notification:)), name: .TimeLeft, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(stopTimer(notification:)), name: .StopTimer, object: nil)

        print("Did present")
    }

    @objc func stopTimer(notification: Notification) {
        self.panelManager.dismiss()
        self.timer?.invalidate()
        self.timer = nil
        NotificationCenter.default.removeObserver(self, name: .TimeLeft, object: nil)
        NotificationCenter.default.removeObserver(self, name: .StopTimer, object: nil)
        NotificationCenter.default.removeObserver(TimerViewController(), name: .CurrentSession, object: nil)
    }

Initially it works and the panel will be dismissed, but when I scroll up or down on the table view...

I can't seem to figure out how to stop it from doing this. Does using NotificationCenter not work well with Panels?

The premise is relatively simple, looking at https://github.com/antoniocasero/Panels/blob/master/Sources/Panels.swift#L50 the safeAreaBottom is added to the PanelHeightConstraint every time show is being executed.

Now in my specific use case, I instantiate the Panelable VC with my parent VC and only show the Panel on didSelect, I dismiss it on didDeselect. With this behavior, the headerHeigh grows every time I execute show which ends up pushing my header further down each time. The examples show the same behavior (although, it's constraints break and recovery recovers the correct constraints).

Panel

1. Show
2. Dismiss
3. Show
4. Dismiss (Here after dismiss animation, panel stay remain on visible position )

Any help?

Below is my code, took latest from pods (2.0.3)

            if self.currentPanel != nil {
                panelManager?.dismiss()
                self.currentPanel = nil
            } else {
                currentPanel = UIStoryboard.instantiatePanel(identifier: "PanelOptions")
                var panelConfiguration = PanelConfiguration(size: .custom(200))
                panelConfiguration.panelVisibleArea = 30
                
                panelManager?.show(panel: currentPanel as! UIViewController & Panelable, config: panelConfiguration)
            }

Hi, I installed the panels pod and setup all the necessary code, then i launched the app on the simulator and everything works like a charm, but when i try to run on a real device the app crashs with the next error:

dyld: Library not loaded: @rpath/Panels.framework/Panels Referenced from: /private/var/containers/Bundle/Application/4CA47637-BDFB-4473-9305-729F57C14B4A/Metro Sahel.app/Metro Sahel Reason: no suitable image found. Did find: /private/var/containers/Bundle/Application/4CA47637-BDFB-4473-9305-729F57C14B4A/Metro Sahel.app/Frameworks/Panels.framework/Panels: code signature invalid for '/private/var/containers/Bundle/Application/4CA47637-BDFB-4473-9305-729F57C14B4A/Metro Sahel.app/Frameworks/Panels.framework/Panels'

Xcode version : 11.3.1 Device used: iPhone 7 Plus / iOS 13.3.1

The example app crashes while unwrapping an optional if you open the "Material" example, then open the panel and tap Close a few times.

movePanel(value:keyboard:completion:)

panelHeightConstraint!.constant = value
Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value

Thanks for a great and simple library!

I needed to do some UI work after the animation of collapse/expand completes, but noticed it was not behaving as expected. So I moved the events within the completion handler to make sure those events are passed onto me only after the animation completes.

Hi, As the title said when I trying to select the UITextField in the panel. It will collapse to the button. Is there any settings can prevent this situation? Thanks.

Followed all the steps and the demo project. But whenever I try call panel view controller, ti gives me the following errors Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView constant]: unrecognized selector sent to instance.

$ pod install

...

[!] Automatically assigning platform `ios` with version `11.2` on target `Panels_Example` because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.

Hi I am getting this behavior when a panel is present and the keyboard is opened. Penel moves up and fits the keyboard top(below picture). How to stop this behavior? I have tried keyboard observer too but no success yet. conf.keyboardObserver = false Thanks for this nice library.

Hi, great project to reproduce Android bottom sheets. It would be great to have a drag gesture that follow the movement, not just a toggle up/down. Best.