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From "Shazron Abdullah (JIRA)" <>
Subject [jira] [Resolved] (CB-1751) Cordova 2.1.0 : custom plugin handle memory warning
Date Thu, 01 Nov 2012 22:50:13 GMT


Shazron Abdullah resolved CB-1751.

    Resolution: Not A Problem

This issue tracker is for Cordova API issues only, not custom plugins. Please post to the
PhoneGap Google Groups and cc/me at shazron at gmail dot com, I'll try to help if I can.
> Cordova 2.1.0 : custom plugin handle memory warning
> ---------------------------------------------------
>                 Key: CB-1751
>                 URL:
>             Project: Apache Cordova
>          Issue Type: New Feature
>          Components: iOS
>    Affects Versions: 2.1.0
>         Environment: iOS version 5+
>            Reporter: elio d'antoni
>            Assignee: Shazron Abdullah
>            Priority: Blocker
> First of all I'm sorry if writing here is the wrong place but it's really hard to find
some technical help about cordova.
> Straight to the problem : I have built a custom iOS plugin (basically an advanced version
of CDVCamera) When the plugin is called, using cordova.exec(..), my cameraController is presented
as modalController on top of mine CDVViewcontroller subclass, using the cameraController my
app receive some memory warnings that cause the unload of the CDVCordovaView.
> Looking in to the iOS cordova lib code I noted that this scenario is faced by CDVViewcontroller
by checking if one of the plugin has pending operation and if yes the memory is not purged.

> To achieve this the plugin(i.e CDVCamera) use the property hasPendingOperation
> this property is set to true during the plugin lifecycle and to false once the operation
are finished.
> So inspired by the CDVCamera code I've declared this property and set it to true during
my capture operations, but didn't work.
> The problem,or at least one of the problems, is that didReceiveMemoryWarning is not called
on CDVViewController but is called in his subclass and even if I call [super didReceiveMemoryWarning]
the method of the superClass is not called,
> in any case viewDidunload is called on the superClass causing the "freeze" of my app.

> So after this long story the question is how can I achieve the behavior of CDVCamera
in a custom plugin, that is , how avoid the unload of the CDVCordovaView during a memory warning.
> Thanks in advance for any help / suggestion

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