How to know when the calendar stop scrolling?

[IsmailHassanein]

Hi @WenchaoIOS
I have a lot of events to load in the calendar for 10 years range. what I'm trying to do it loading more data with scrolling and when loading finishes I call calendar.relaodData(). The problem is when that happens while the calendar is still dragging or decelerating, the scrolling is interrubtted. What I want to do is get the data and check before I reload the calendar if it's scrolling or not. if not scrolling I update the calendar with the new data if still scrolling I set calendarNeedsUpdate = true, but I couldn't find a way to detect when the calendar stop scrolling to update it.
If there is a way to get notifiyed when it stop scrolling or anyother suggesstion is much appreciated.
Thanks,

[WenchaoD]

Why not loading on calendarCurrentPageDidChange:?

[IsmailHassanein]

@WenchaoIOS Sorry for not explaining my problem accurately.
I use calendarCurrentPageDidChange() to call the API and get more data for the next 4 months. then update the data source and call reloadData().
My problem is when I call calendar.reloadData() at the time the calendar is scrolling, it makes the scroll jumpy and not smooth. So I thought of call the API in calendarCurrentPageDidChange() but make sure not to call calendar.reloadData() until it stop scrolling. So I need to know when it stops scrolling.
Thanks.

[IsmailHassanein]

@WenchaoIOS Any Suggestions?

[WenchaoD]

What do you mean by 'jumpy'?

[IsmailHassanein]

Not smooth. the loading interrupts the scrolling animation when I call calendar.relaodData() while the calendar is scrolling.

[WenchaoD]

Can you make a sample project? A repo or a droxbox link?

[IsmailHassanein]

https://www.dropbox.com/s/fsm4dlugt5g6zmi/FSCalendar-1.6.2%202.zip?dl=0
it's not the same but something similar. the main idea is calling relaodData while scrolling.
please find my change and try the FullScreen example.

The best thing I'm looking for is to be able to do something like instead of reloadData directelly. call updateCalendarI()

var calendarNeedsUpdate  = false 
func  updateCalendarI(){
if   calendar.collectionView.dragging == false && calendar.collectionView.decelerating == false {
   calendar.reloadData()
} else {
calendarNeedsUpdate = true
}
}
func SomewhereIGetNotifiedWhenCalenarStopsScrolling () {
    if calendarNeedsUpdate {
      calendar.relaodData()
}
}

[WenchaoD]

I've pushed a few commits to make reloadData looks less 'jumpy'. Try this branch?

[IsmailHassanein]

Hi @WenchaoIOS
I have tried the updated master branch today. there is a problem if you scroll fast you will find the cell day number changes. as it has not beed reset properly before reused or an async proccess updated the cell after it has been reused by another indexPath.I'm not sure, I didn't check the code. it's only what I observed.

To observe it, you need to set some borders, colours and title colors (make it needs more time to proccess) and load it on a slow machine (I use iPad 2)
I'll open an issue for this.