I’m going to mention the word tableView, please do not move this to the widget group. I’m using widgets, but this isn’t a widget problem, maybe.
I’m trying to build a tableView of all of my facebook friends. I have it mostly working as long as I drag the tableView I don’t have problems. “Okay, so what’s wrong?” Well I have two specific problems, so lets focus on this one first:
In the working version of the code, I get the URL for the 50x50 avatar from Facebook like I expect and I fire off a:
display.loadRemoteImage( url, “GET”, thumbListener, filename, system.CachesDirectory, 0, 0 )
filename is the Facebook userID and a “.jpg”. My thumbListener fires after it’s done downloading and I get the image like expect.
However it’s stupid to download the images every time and when I try to rapidly jump through the tableView (via search or via one of those Contact like A, B, C bars) I get all kinds of errors about :insert being null on the tableView row group. So I decided that I would just load the existing files from cache. Consider this code:
local lfs = require("lfs")
local function onRowRender(event)
print("row render")
local row = event.target
local rowGroup = event.view
local id = event.index
print(id)
--
local function thumbListener( event )
if ( event.isError ) then
print ( "Network error - download failed" )
else
if shouldRenderImage then
--print ("got image")
--print\_r(event)
-- event.target is the loaded display.newImage from the downloaded image.
if event.target then
local w = event.target.width
local h = event.target.height
local s = 39 / h
event.target:scale(s,s)
event.target:setReferencePoint(display.TopLeftReferencePoint)
event.target.x = 200 - (w \* s)
event.target.y = 1
rowGroup:insert(event.target) -- this errors if I try to use list:scrollToIndex(index,0) saying it doesn't exist... some of the time.
else
local emptyPlayer = display.newImageRect("images/GS\_PlayerDefaultImage.png", 41, 39)
emptyPlayer:setReferencePoint(display.TopLeftReferencePoint)
emptyPlayer.x = 200 - 41
emptyPlayer.y = 1
rowGroup:insert(emptyPlayer)
end
end
end
--print ( "RESPONSE: " .. event.response )
end
local url = friends[id].avatar
local filename = friends[id].id .. ".jpg"
local file\_path = system.pathForFile( filename, system.CachesDirectory )
-- get last modified time
local file\_attr = lfs.attributes( file\_path )
local last\_mod
if file\_attr then
last\_mod = file\_attr.modification
print(file\_path,last\_mod,os.time(),(last\_mod + 24 \* 60 \* 60) \> os.time())
end
if file\_attr and (last\_mod + 24 \* 60 \* 60) \> os.time() then -- use cached file if it exists and is less than a day old
print("loading ", filename, "from", system.CachesDirectory)
local avatar = display.newImage(filename, system.CachesDirectory, 0, 0)
local w = avatar.width
local h = avatar.height
local s = 39 / h
print(w,h,s,avatar.x, avatar.y)
avatar:scale(s,s)
avatar:setReferencePoint(display.TopLeftReferencePoint)
avatar.x = 200 - (w \* s)
avatar.y = 1
rowGroup:insert(avatar)
else
if url then
display.loadRemoteImage( url, "GET", thumbListener, filename, system.CachesDirectory, 0, 0 )
else
local emptyPlayer = display.newImageRect("images/GS\_PlayerDefaultImage.png", 41, 39)
emptyPlayer:setReferencePoint(display.TopLeftReferencePoint)
emptyPlayer.x = 200 - 41
emptyPlayer.y = 1
rowGroup:insert(emptyPlayer)
end
end So to sum up, if I get to display.loadRemoteImage, the thumbListener fires and I get images (though some times if it’s too fast, I get errors.
I see the prints that tell me it should be loading the cached copy. The height and width are both 50 which I expect since that is the image size, so I know it’s actually loading the image, I just never get it displayed.
Can you see any reason why my cached images wouldn’t load?
Thanks
Rob
[import]uid: 19626 topic_id: 30775 reply_id: 330775[/import]