Implementing two consumables with MKStoreKit

How should I implement two consumables with MKStoreKit? If I have two consumables, for example "handful of coins" (10 coins) and "bag with coins" (100 coins). I have two questions:

How should product IDs look like?
How to get overall amount of purchased coins, including ones from handful(s) and from bag(s)?
```
Amount = 10*handfuls_purchased + 100*bags_purchased;
```

I've read tutorial on official MKStoreKit blog but I still just can't figure this out.

P.s. I'm using MKStoreKit 3.1 and can't update to more recent version because of ARC (my project doesn't support it)

Solution

Your plist's consumables key should look like this.

<key>Consumables</key>
    <dict>
        <key>com.yourcompany.yourapp.handfulofcoins</key>
        <dict>
            <key>Count</key>
            <integer>10</integer>
            <key>Name</key>
            <string>CoinsInMyApp</string>
        </dict>
<key>com.yourcompany.yourapp.bagofcoins</key>
        <dict>
            <key>Count</key>
            <integer>100</integer>
            <key>Name</key>
            <string>CoinsInMyApp</string>
        </dict>
    </dict>

I match the String "CoinsInMyApp" to calculate the number of purchased coins no matter which consumable they come from. In the above example if the user buys 1 bagofcoins and 2 handfulofcoins, MKStoreManager stores 120 for the key CoinsInMyApp.

methods,

- (BOOL) canConsumeProduct:(NSString*) productIdentifier
- (BOOL) canConsumeProduct:(NSString*) productIdentifier quantity:(int) quantity

will tell you if you have enough products.

When the player uses coins, you should let MKStoreKit know this by calling

- (BOOL) consumeProduct:(NSString*) productIdentifier quantity:(int) quantity

You can get the number of coins by calling

[[MKStoreManager numberForKey:@"CoinsInMyApp"] intValue];

PS: You can use MKStoreKit latest version in a non-ARC project by compiling it with the -fobjc-arc flag.

I wrote about this here http://blog.mugunthkumar.com/articles/migrating-your-code-to-objective-c-arc/