By Bill Dudney
Mac OS X Leopard introduces a wonderful new know-how that makes writing functions with lively and cinematic person interfaces a lot more uncomplicated. we are going to discover this new expertise via beginning with the popular suggestions you realize from the pre-Leopard improvement kits.
Then we are going to see how they practice to the hot frameworks and APIs. we will construct in your current wisdom of Cocoa and convey you successfully up to the mark on what center Animation is all approximately.
With this e-book in hand, you could upload middle Animation for your Cocoa functions, and make attractive person interfaces that your user's could be exhibiting off to their friends.
Read Online or Download Core animation for Mac OS X and the iPhone: Creating compelling dynamic user interfaces PDF
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Additional info for Core animation for Mac OS X and the iPhone: Creating compelling dynamic user interfaces
This is one of those cases where we can really cause some unintended drawing and animation if we have manipulated the layer behind the view’s back. We will discuss the anchorPoint more later, but when dealing with layer-backed views, it’s best not to change this property. 6 Layer Backing and Performance Concerns Once one view in a hierarchy turns on layer backing, each view in that hierarchy has layer backing turned on, regardless of the particular subview’s desire. If a subview states that it also wants layer backing, it is redundant.
For example, we could group an alpha fade, a frame movement, and a resize. Then add the group animation to the view so that it is triggered when the frame origin is set. When working with groups, you need to set the keyPath for each of the animations that is part of the group. 3, Finding Animations, on page 23. However, the constituent animations are not associated with any particular key (since they are in the group and not part of the animations dictionary) and thus will not cause any animation.
This custom animation is used because of the searching mechanism used by the animator (discussed in Chapter 2, Cocoa Animation, on page 17). Recall that first it checks the animations dictionary, and if an animation is found there, it’s used. So, once we put this animation into the animations dictionary, the animator will use it whenever the frameOrigin property is changed. This animation will stay in effect until we explicitly remove it. mover setAnimations:animations]; } That brings us to the setDefault: method on line 1.