Pull down to refresh swipe gesture

Paul Hibbert paul at livecode.org
Thu Jul 2 12:28:53 EDT 2015


Skip,

http://lessons.runrev.com/m/4069/l/29603-creating-a-simple-stock-control-application-for-the-ipad (scroll down to "Using Swipe Gestures”).

I’ve adapted the LC lesson (link above) for something similar. Of course if you are testing for swipes left and right also, you may need a little more tweaking, but here’s the basics of the script…

local  sCoordinateArray

on touchStart pID 
   ## When the user touches the screen     
   put empty into sCoordinateArray["start"] 
   put empty into sCoordinateArray["end"]
end touchStart

on touchMove pID, x y 
   if sCoordinateArray["start"] is empty then        
      put y into sCoordinateArray["start"] 
   else        
      put y into sCoordinateArray["end"] 
   end if
end touchMove

on touchEnd 
   put sCoordinateArray["start"] into tStart 
   put sCoordinateArray["end"] into tEnd
   ## Compare the x coordinates of the start and end point     
   ## This tells us the direction of the movement    
   if tStart is not empty and tEnd is not empty then 
      if tStart < tEnd and tEnd - tStart > 100 then
         swipeDown
      else if tStart > tEnd and tStart - tEnd > 100 then
         swipeUp
      end if 
   end if    
   put empty into sCoordinateArray["start"]
   put empty into sCoordinateArray["end"] 
end touchEnd

on swipeDown
   answer "Swipe Down!"
end swipeDown

on swipeUp
   answer "Swipe Up!"
end swipeUp

Paul

> On Jul 2, 2015, at 03:10, Skip Kimpel <skiplondon at gmail.com> wrote:
> 
> Good morning,
> 
> Has anybody created the "pull down to refresh" swipe gesture?  I have an app where there is a refresh button on it but during testing I keep seeing users trying to pull down on the screen to achieve the function of refreshing the data.
> 
> I am assuming it would need to be simulated and would not be native functionality, correct?
> 
> SKIP
> 
> 
> 
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