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Programmatic way to go to next/previous month #47

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BaptisteSansierra opened this issue Jun 13, 2016 · 3 comments
Closed

Programmatic way to go to next/previous month #47

BaptisteSansierra opened this issue Jun 13, 2016 · 3 comments
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@BaptisteSansierra
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BaptisteSansierra commented Jun 13, 2016 •
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I'v added arrow buttons to go to next/previous month (image posted on 18 june), but it seems there's no way to do this programmatically at the moment ?

I did it adding these funcs in JTAppleCalendarView.swift

`

public func scrollToNextSection(completion: () -> Void) {
    let cvbounds = self.calendarView.bounds
    let totalSections = monthInfo.count * numberOfSectionsPerMonth
    var page = min(currentSectionPage + 1, totalSections - 1)
    var offsetx = self.calendarView.contentOffset.x
    var offsety = self.calendarView.contentOffset.y
    if self.direction == .Horizontal {
        offsetx = CGFloat(page) * cvbounds.size.width
    } else {
        offsety = CGFloat(page) * cvbounds.size.height
    }
    UIView.animateWithDuration(0.4, animations: {
        self.calendarView.contentOffset = CGPointMake(offsetx, offsety)
        }, completion: { done in
            completion()
    })
}
public func scrollToPreviousSection(completion: () -> Void) {
    let cvbounds = self.calendarView.bounds
    let totalSections = monthInfo.count * numberOfSectionsPerMonth
    var page = max(currentSectionPage - 1, 0)
    var offsetx = self.calendarView.contentOffset.x
    var offsety = self.calendarView.contentOffset.y
    if self.direction == .Horizontal {
        offsetx = CGFloat(page) * cvbounds.size.width
    } else {
        offsety = CGFloat(page) * cvbounds.size.height
    }
    UIView.animateWithDuration(0.4, animations: {
        self.calendarView.contentOffset = CGPointMake(offsetx, offsety)
        }, completion: { done in
            completion()
    })
}

`

But when animating, all the cells from current month disappear... it's not as nice as doing it by scroll...

There's definitely a better option ?!
@BaptisteSansierra
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Ok sorry, i missed the funcs scrollToNextSegment / scrollToPreviousSegment, which are doing this very well, but the completion handler was never used, i fixed it that way :

    public func scrollToNextSegment(animateScroll: Bool = true, completionHandler:(()->Void)? = nil) {
        let page = currentSectionPage
        if page + 1 < monthInfo.count {
            let position: UICollectionViewScrollPosition = self.direction == .Horizontal ? .Left : .Top
            if let validHandler = completionHandler {
              delayedExecutionClosure.append(validHandler)
            }
            calendarView.scrollToItemAtIndexPath(NSIndexPath(forItem: 0, inSection:page + 1), atScrollPosition: position, animated: animateScroll)
        }
    }
    public func scrollToPreviousSegment(animateScroll: Bool = true, completionHandler:(()->Void)? = nil) {
        let page = currentSectionPage
        if page - 1 > -1 {
            let position: UICollectionViewScrollPosition = self.direction == .Horizontal ? .Left : .Top
            if let validHandler = completionHandler {
              delayedExecutionClosure.append(validHandler)
            }
            calendarView.scrollToItemAtIndexPath(NSIndexPath(forItem: 0, inSection:page - 1), atScrollPosition: position, animated: animateScroll)
        }
    }

@BaptisteSansierra
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(just created a pull request)

@patchthecode
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Just went through your code. Its neat. Its now merged.
Yea i must have missed that one

@fweathers fweathers mentioned this issue Aug 2, 2017
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@patchthecode @BaptisteSansierra