Calendar disrupts on orientation change

[harshvishu]

Issue
When rotating device (iPad). The calendar changes the current month randomly.
This might help, mostly the months are : May 2007, 2008.

The selected dates are also changed. But the calendar resets to the original state when taped/ interacted upon.

steps to reproduce
Using FSCalendar from InterfaceBuilder. Rotate the device

Device modal and version
iPad , OS version 10.1

Xcode version: Xcode 8.1 beta
FSCalendar version: pod 'FSCalendar'

[WenchaoD]

@harshvishu Does it happen in StoryboardExample in you iPad? And which modal of the iPad BTW.

[harshvishu]

Yes It is happening in storyboard but I've not tried building it through code.
And the model for iPad is : iPad Air 2, os: 10.0.2

[muthuselvamlms]

I too got the same issue. Any one has answer for this?

[h-bomb]

I reproduced the issue in the current master branch, SwiftExample, on iPad Pro 9.3 and 10.2 simulators and an iPad Air 2 10.0.2 device. Here is a video demonstrating the issue. Note when transitioning from portrait to landscape that the Month/Year header changes from the current month/year (January 2017) to May 2001.

@harshvishu, could you change the title to reflect the actual issue, i.e., the the month / year changes to the wrong month / year on rotation? Thanks.

[WenchaoD]

Hi @h-bomb . Thanks for the demo video. The issue in the SwiftExample has been fixed.

[h-bomb]

@WenchaoD: Does this work with multitasking on supported iPads (e.g., iPad Air 2, iPad Pro)? When in the slide over menu, I am not able to switch to a split view with SwiftExample to test.

I'm using the following work-around in my view controller, but it's not the best work-around since you can see the month/year header and days scrolling as you rotate or switch to multitasking mode (which looks pretty bad) - still working on it:

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)
    coordinator.animate(alongsideTransition: {_ in
        self.calendar.select(self.calendar.selectedDate)
    }, completion: nil)
}

[h-bomb]

@WenchaoD: I was able to fix everything in my view controller. Just an FYI, I'm still running off of my forked branch (based on your 2.4.0 version.)

[WenchaoD]

@h-bomb Can you create a new issue along with an example for the slide-menu problem?

[h-bomb]

@WenchaoD: No problem: #546

[alekseilobankov]

@WenchaoD: Does this work with multitasking on supported iPads (e.g., iPad Air 2, iPad Pro)? When in the slide over menu, I am not able to switch to a split view with SwiftExample to test.

I'm using the following work-around in my view controller, but it's not the best work-around since you can see the month/year header and days scrolling as you rotate or switch to multitasking mode (which looks pretty bad) - still working on it:

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)
    coordinator.animate(alongsideTransition: {_ in
        self.calendar.select(self.calendar.selectedDate)
    }, completion: nil)
}

I still have the same issue. After rotating the device to landscape, calendar selects some random date few years ago. Was it really fixed?
The problem occurred when using FSCalendar as an arranged subview of a stackview. I change stackview axis on device rotation.