Partially Earned Achievements
In the previous example, the achievement was either fully earned or not earned at all. The next achievement that will be implemented into Whack-a-Cac is com.dragonforged.whackacac.score100. Unlike the Kill One achievement, this one can be partially progressed, although it is nonstackable between games. The user is required to score 100 points in a single game. The process begins the same way as the preceding example, in that a reference to the GKAchievement object is created.
GKAchievement *score100Achievement = [[ICFGameCenterManagersharedManager] achievementForIdentifier:@"com.dragonforged.whackacac.score100"];
A quick test is performed to ensure that the achievement is not already ...
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