IPHONE: Storekit – aborting transactions restoring (in-app purchase)

iphone

As "suggested" by Apple, I have put a button on my application, to restore old successful transactions, in my in-app purchase application.

The problem is this. The user clicks the button and the application starts restoring the transactions. If the application is closed for some reason during this process, the process will continue the next time the application runs.

In my case, restoring all transactions can take some time, specially if the user has many transactions. So, when the application starts again, I see a black screen and the application do not loads until the last transaction is restored.

Apparently the process of restoring the transactions hangs the application that do not loads until it finishes.

As Apple recommends, I have this, on the beginning of my app…

CustomStoreObserver *observer = [[CustomStoreObserver alloc] init];
[[SKPaymentQueue defaultQueue] addTransactionObserver:observer];

This is useful for restoring interrupted sales but in my case is causing a pain when the question is restoring old transactions already bought.

I would like to be able to abort any restoration of old transactions that could run, when the program starts and just allow them while toe app is running.

Any way to do that?

Best Answer

Can you not create the store observer in a different thread/run loop so that it doesn't block the UI thread?

Failing that, only add the transaction observer after you have made a splash screen visible?

Related Solutions

R – iPhone in-app purchase: How to detect unfinished transactions using storekit

I decided that it was impossible to do this using store kit alone so I made a small table in sqlite:

create table purchased_products (
  product_identifier text primary key, -- apple store id string
  purchased integer not null           -- 1 if purchased
);

and when I get the SKPaymentQueue callback indicating that a product has been purchased I add a row to this table.

It's working just fine.

Ios – iPhone App Icons – Exact Radius

You can make four icons (as of today) for your app and they can all have a different look - not necessarily based on the 512x512 image.

corner radius for the 512x512 icon = 80 (iTunesArtwork)
corner radius for the 1024x1024 icon = 180 (iTunesArtwork Retina)
corner radius for the 57x57 icon = 9 (iPhone/iPod Touch)
corner radius for the 114x114 icon = 18 (iPhone/iPod Touch Retina)
corner radius for the 72x72 icon = 11 (iPad)
corner radius for the 144x144 icon = 23 (iPad Retina)

If you do create a set of custom icons, you can set the UIPrerenderedIcon option to true in your info.plist file and it will not add the gloss effect but it will place a black background under it and still round the image corners with these corner radii so if the corner radius on any of the icons is greater then it will show black around the edges/corners.

Edit: See comment from @devin-g-rhode and you can see that any future icon sizes should have a 1:6.4 ratio of corner radius to icon size. There is also a very good answer from https://stackoverflow.com/a/29550364/396005 which has the location of image mask files used in the SDK for rounding icon corners

To add a retina-compatible file, use the same file name and add '@2x'. So if I had a file for my 72x72 icon named icon.png, I would also add a 114x114 PNG file named icon@2x.png to the project/target and Xcode would automatically use that as the icon on a retina display. You can see this in action on the Summary page of the application target if you've done it right. The same works for your launch images. Use launch.png at 320x480 and launch@2x.png at 640x960.

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