Summary
This chapter introduces a number of ready-to-use controllers that you can prepare and present to good effect. System-supplied controllers simplify programming for common tasks like tweeting and sending e-mail. Here are a few parting thoughts about the recipes you just encountered:
You can roll your own versions of a few of these controllers, but why bother? System-supplied controllers are the rare cases where enforcing your own design takes a back seat to a consistency of user experience across applications. When a user sends an e-mail, he or she expects that e-mail compose screen to look basically the same, regardless of application. ...
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