More iPhone 3 Development

by David Mark and Jeff LaMarche

I, Michael Parker, own this book and took these notes to further my own learning. If you enjoy these notes, please purchase the book!

pg 369: When testing if a coordinate is within a map view’s displayed region, be sure to account for the international date line.
pg 370: The annotation view is the object that gets displayed on the map, not the floating window (or callout) that is displayed when it’s selected.
pg 373: Your map view’s delegate is notified with all annotations; test the annotation class and return nil for any classes you don’t recognize.
pg 376: If you need to track the user’s location, let the map view do it for you.
pg 378: You can redefine properties to be more permissive than declared in a protocol or in a superclass.
pg 379: A newline in a string will be stripped out when displayed in the annotation’s callout view.
pg 385: The location manager may give you stale data from the cache at first; you can ignore it and wait until fresh data arrives.

pg 458: Non-repeating timers are not typically used; instead, call the method performSelector:withObject:afterDelay.
pg 472: Accessors declared atomic autorelease returned values, so if another thread sets a new value through a mutator, the old value is not deallocated under a thread still working with it.
pg 473: Most of UIKit is not thread safe; don’t set or retrieve values or work with outlets from threads other than the main thread.
pg 475: When subclassing NSOperation, the main method must create its own autorelease pool, and wrap all logic in a @try block so no uncaught exceptions kill the application.
pg 478: Sending a cancel message to an operation only sets the property; it is up to the main method to check whether it has been cancelled and stop appropriately.
pg 489: Key value observation enables notification whenever objects are changed.

Provide feedback