Chapter 20. Using Built-In Dialog Boxes
Apple provides plenty of prewritten and tested code you can reuse from the Cocoa framework. Besides letting you create a program faster, prewritten code also ensures that your program looks and behaves like a typical Mac program. One of the common elements of every Mac program are dialog boxes, which are windows that pop up and allow the user to print, open, or save a file. Rather than force you to create these common user interface elements yourself, Apple provides you with built-in dialog boxes that you can plug into your own program.
One common built-in dialog box is an alert panel that pops up on the screen to alert the user to something, such as confirming that the computer is about to delete a file ...
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