GitHub user lucatorella opened a pull request:
https://github.com/apache/cordova-plugin-wkwebview-engine/pull/17
Avoid retain cycle caused by WKUserContentController retaining its message
handler
### Platforms affected
iOS
### What does this PR do?
This PR breaks the retain cycle caused by WKUserContentController retaining
its message handler. This retain cycle would cause apps that create different
CDVViewController instances to leak memory. For instance if you have a
navigation controller, and you push a CDVViewController instance and then you
go back, the view controller just pulled out of the stack is not deallocated.
### What testing has been done on this change?
I tested that the message from javascript are still passed. I think it's
enough.
### Checklist
- [ ] [ICLA](http://www.apache.org/licenses/icla.txt) has been signed and
submitted to secret...@apache.org.
- [ ] [Reported an issue](http://cordova.apache.org/contribute/issues.html)
in the JIRA database
- [ ] Commit message follows the format: "CB-3232: (android) Fix bug with
resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform
affected.
- [ ] Added automated test coverage as appropriate for this change.
â¦er, to break it we cannot pass directly CDVWKWebViewEngine's instance
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lucatorella/cordova-plugin-wkwebview-engine
feature/avoid-addScriptMessageHandler-leak
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/cordova-plugin-wkwebview-engine/pull/17.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #17
----
commit 1d135e8ffd1556dd6fee49e820fca902bfb59a6a
Author: Luca Torella <l...@scandit.com>
Date: 2016-09-05T21:53:17Z
Avoid retain cycle: WKUserContentController retains its message handler, to
break it we cannot pass directly CDVWKWebViewEngine's instance
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