Troubles with IOS about phonegap-plugin-barcodescanner

[Evanion]

I discussed this on the Ionic IRC yesterday, and It seems like iOS registers the click twice, and tries to fire up 2 instances. I got a workaround from a helpful guy on IRC, but this fix seems to solve the issue @ native level, and I know we all like to avoid js bloat :)

[wodka]

By now I have a solution*:

one file needs to be modified:
AppDelegate.m

    // replace line 88 "self.window.rootViewController = self.viewController;"
    UINavigationController *aNavigationController = [[UINavigationController alloc]
        initWithRootViewController:self.viewController];
    self.window.rootViewController = aNavigationController;

(source: http://stackoverflow.com/questions/12350437/getting-current-uiviewcontroller-in-phonegap)

-> change will be that the right view is taken :)

you should also apply fix wildabeast/BarcodeScanner#282

update
It just reduced the freezes - the following error happens during a freeze:

Warning: Attempt to present <CDVbcsViewController: 0x13e6a9fb0> on <MainViewController: 0x13e5115f0> whose view is not in the window hierarchy!

[halfpt]

Has there been any progress on this issue? I am encountering it too. I tried the changes to AppDelegate, but it adds an extra header menu into my app (I am using Ionic).

Any pointers would be greatly appreciated.

[wodka]

@halfpt can you try the change from the pull request? I finally found the reason for the behavior (at least for me) - I was calling the scan from a button and there it fired the event twice.

Somehow when it is executed twice the window reference is lost

[halfpt]

Thanks a lot for getting back so quickly - I just applied the PR and it seems to have cleared the issue. Now I think back, my UI button seemed to click/flicker twice during the intermittent instances of the freeze. I'll report back if I encounter another freeze, but thanks again for the heads-up.

[pdsullivan]

I had this happening as well, realized it was caused by the scanner being called more than once. Hope this helps someone. Preventing that from happening fixed the issue. 👍

[pdsullivan]

hmm...

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