Preload external images [PG 2.0/iOS]

[Bernhard Bezdek]

Hey I'm not sure if this is a BUG.

I'm developing an app which preload each image before initial View is shown.

That works great (with images which are placed inside the img folder) and is an established step in my workflow my app.

Now I have an dynamic overview with Thumbnails placed in.

The thumbs are stored on an external server which is whitelisted in my .plist file and is shown if I embed the image directly via <img src="http://192.168.1.133/myimage.png"/>

But if I try to load these image via a JS preloader the complete will be never executed.

oImageList = new Image();

oImageList.onload = function() {

alert('finish')

}

oImageList.src = 'http://192.168.1.133/myimage.png';

I'm using:

- Phonegap 2.0

- iPad

Does anyone has a solution to solve this issue?

Thanks in advance

Bernhard

[Shazron]

Did you try hooking up the onerror and onabort events for Image? Maybe
that will give you a clue to what's wrong.

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[Bernhard Bezdek]

Yes you're right,

error callback is executed but why?

With the logadta of the error object I cannot find any useful message.

2012-08-03 16:41:08.353 myapp[3477:707] [INFO] returnValue->true

2012-08-03 16:41:08.355 myapp[3477:707] [INFO] timeStamp->1344004867322

2012-08-03 16:41:08.356 myapp[3477:707] [INFO] eventPhase->2

2012-08-03 16:41:08.358 myapp[3477:707] [INFO] target->[object HTMLImageElement]

2012-08-03 16:41:08.359 myapp[3477:707] [INFO] defaultPrevented->false

2012-08-03 16:41:08.360 myapp[3477:707] [INFO] srcElement->[object HTMLImageElement]

2012-08-03 16:41:08.362 myapp[3477:707] [INFO] type->error

2012-08-03 16:41:08.363 myappr[3477:707] [INFO] clipboardData->undefined

2012-08-03 16:41:08.364 myapp[3477:707] [INFO] cancelable->false

2012-08-03 16:41:08.366 myapp[3477:707] [INFO] currentTarget->[object HTMLImageElement]

2012-08-03 16:41:08.367 myapp[3477:707] [INFO] bubbles->false

2012-08-03 16:41:08.368 myapp[3477:707] [INFO] cancelBubble->false

Thanks 

Bernhard

[Shazron]

What does your whitelist entry look like. it should just be
"192.168.1.133" without any scheme or path.

On Fri, Aug 3, 2012 at 7:20 AM, Bernhard Bezdek <bernhar...@4fb.de> wrote:

[Bernhard Bezdek]

Yes thats exactly the entry

[Shazron]

I just tested it with external images, it works fine. I think you have
to examine your plist entry - it is probably a sibling of
ExternalHosts instead of a child item.

[Shazron]

This is bad/confusing design on Xcode's plist editor more than
anything else -- unless you expand the disclosure triangle on a
selected item, clicking on "+" on an item will just make the new entry
a sibling item.

In any case, your console log should print out an error if it wasn't
in the whitelist regardless.