Sams Teach Yourself Mac OS® X Lion™ App Development in 24 Hours

Hour 17. Working with Images

What you’ll learn in this hour:

• Reading and Writing Images

• Displaying Collections of Images

• Manipulating Images with Core Image Filters

Throughout this book you have seen bits and pieces of Cocoa’s ability to deal with images. In one hour you used Core Data to allow users to drag images into a box and save them. In other hours, you’ve seen how you can place images and icons throughout your user interface to create a richer, more interactive experience.

In this hour, we’ll take that knowledge and extend it. Images can add tremendous power to your application and can dramatically enhance the overall user experience. In this hour, you’ll learn how to display images read from disk and how to save them to disk. ...