Presenting a Leaderboard
Now that we have a leaderboard in iTunes Connect, and populated a score into that leaderboard, it is time to present the leaderboard to the user. There are two ways of presentation: the first is with Apple's GUI; the second is with a custom GUI. This section will take a look at the implementation using Apple's GUI. In the next section, you will learn how to present a leaderboard with custom graphics.
Before we can begin, we need to create a new button that will trigger the leaderboard. We want to do this outside of the game screen, because you do not want to drag the user away from a game in progress to view a leaderboard. Begin by adding a new button to the UFOViewController view, as shown in Figure 3–7.
Figure ...
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