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    a question related to URL loader class

    ashlyn_scottashlyn_scott Member
    edited September 2012 in General questions 
     
i = 0
q = ""
while (i<2)
do
	local loader = UrlLoader.new("<a href="http://localhost/example.php&quot" rel="nofollow">http://localhost/example.php&quot</a><img class="emoji" src="http://forum.giderosmobile.com/resources/emoji/wink.png" title=";)" alt=";)" height="20" />
 
	local function onComplete(event)
		print(event.data)
		q = event.data
	end
 
	local function onError()
		print("error")
	end
	local function onProgress(event)
		print("progress: " .. event.bytesLoaded .. " of " .. event.bytesTotal)
	end
 
	loader:addEventListener(Event.COMPLETE, onComplete)
	loader:addEventListener(Event.ERROR, onError)
	loader:addEventListener(Event.PROGRESS, onProgress)
 
	i = i + 1
	print ("q1 : " .. q)      ---q is nil here .Why??
end
 
print ("q : " .. q)                   -----q is nil here .Why??
    Although q is global and assigned a value , why is it still nil?
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    Comments

    • techdojotechdojo Guru
      Do you mean "nil" as in the code generates an error or does it print "" (ie nothing)?

      The simple (and trite) answer is that "you told it to!" - not helpful I know :) it might be more helpful if you add in a couple more print statements and then copy and paste the output window contents.

      It *might* be because event.data is nil because your local server might not have served the example.php file correctly. Try pinging http://google.com and see what you get back from there.
      WhiteTree Games - Home, home on the web, where the bits and bytes they do play!
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    • ashlyn_scottashlyn_scott Member
      I get the below code from Reference Manual .It works with my URL(example.php):
       
local loader = UrlLoader.new("<a href="http://example.com/image.png&quot" rel="nofollow">http://example.com/image.png&quot</a><img class="emoji" src="http://forum.giderosmobile.com/resources/emoji/wink.png" title=";)" alt=";)" height="20" />
 
local function onComplete(event)
    local out = io.open("|D|image.png", "wb")
    out:write(event.data)
    out:close()
 
    local b = Bitmap.new(Texture.new("|D|image.png"))
    stage:addChild(b)
end
 
local function onError()
    print("error")
end
 
local function onProgress(event)
    print("progress: " .. event.bytesLoaded .. " of " .. event.bytesTotal)
end
 
loader:addEventListener(Event.COMPLETE, onComplete)
loader:addEventListener(Event.ERROR, onError)
loader:addEventListener(Event.PROGRESS, onProgress)
      But in my code , i tried to assign event.data to a global variable in each loop. And then i want to print them
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