Challenges
Most chapters in this book will finish with at least one challenge that encourages you to take your work in the chapter one step further and prove to yourself what you have learned. We suggest that you tackle as many of these challenges as you can to cement your knowledge and move from learning iOS development from us to doing iOS development on your own.
Challenges come in three levels of difficulty:
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Bronze challenges typically ask you to do something very similar to what you did in the chapter. These challenges reinforce what you learned in the chapter and force you to type in similar code without having it laid out in front of you. Practice makes perfect.
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Silver challenges require you to do more digging and more ...
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