Hi Ansca,
I have been working with the updated (horizontal-scrolling) widget.newScrollView API, but for some reason I've yet to get the scrollToX method working properly. Anytime I call it, I get the following error message in the terminal:
1 2 | Runtime error attempt to call method 'scrollToX' (a nil value) |
Doesn't work for me either, was gonna post the problem but i'll just tack onto yours instead.
I have no problems using scrollToTop, Bottom etc, just X and Y.
It appears the method is not implemented???
"attempt to call method 'scrollToX' (a nil value)"
@mimetic: agreed, it would appear that this method, while referenced in the API docs online, is not actually baked into the current daily builds. I also tried variations on the name with different capitalization (scrolltox, ScrollToX, etc.), hoping that perhaps it was just a typo in the API docs, but I've still had no luck. :(
However, I see there is a "scrollToPosition". It positions the scroll view image at x,y, around the top-left corner of the screen, not the center of the screen.
So, to scroll to the center of your image, do it this way:
1 2 3 4 5 6 7 8 | local screenW, screenH = display.contentWidth, display.contentHeight local midscreenX = screenW*(0.5) local midscreenY = screenH*(0.5) ... -- show at center immediately. local timeToScroll = 0 myscrollview:scrollToPosition(-myscrollview.contentWidth/2 + midscreenX,-myscrollview.contentHeight/2 + midscreenY,timeToScroll) |
That's great! I hadn't thought to use the scrollToPosition method instead. Thanks!
The absence of the scrollToX method is still a bug, but your suggestion helps me out a great deal. Thanks!
ARGH! I can't get the scrollView object to insert into something else and behave! It is sitting on top of everything!
Using daily build #732, I'm able to insert scrollViews into display groups using this syntax:
1 2 3 4 5 | someGroup = display.newGroup() scrollView = widget.newScrollView{[parameters]} someGroup:insert(scrollView) |
My silly bad...a local in a block...it works.
Hey guys - have you filed a bug report with sample code?
Danny was investigating this on another thread a few days ago, no reply since though.
http://developer.anscamobile.com/forum/2012/01/11/build-723-missing-methods-newscrollview
@Peach: Yes, I filed a bug shortly after I started this thread. The case # is 11784. Thanks!
Hi everyone. There is a mismatch in the documentation. scrollToX and scrollToY are internal methods that are not publicly available. Instead, you use scrollToPosition (no need to wait for a daily build, it's already in there).
Here's the syntax:
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