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The Complete Idiot's Guide® To iPad and iPhone App Development by Troy Brant

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Try It Out

So, does it work? Save the project, build it, launch it, and give it a whirl. Try the segmented control. Success! Okay, now try the switch at the bottom. Huzzah! Now try the slider! Wait a minute. The text doesn’t increase in size if you slide past size 17. What’s going on?
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CRASH AND LEARN
Do you get a warning that “FontsViewController may not respond to ‘-updateText’”? If so, you can get rid of the warning by moving the -updateText method body above the line of code that first calls it. This is due to the fact the Xcode compiler only makes a single pass through each source file, so helper methods must be defined before they are ...

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