TAILIEUCHUNG - Core Animation Programming Guide

The adoption of software-defined test systems is the most significant trend among these industry- leading test engineering teams. Engineers are using software-defined test systems to achieve new levels of measurement performance and lower test costs. The quick return on investment from these benefits is contributing significantly to the mainstream adoption of the software-defined test system approach. Thousands of companies are building software-defined test systems based on NI software tools and the open, multivendor PXI hardware standard. According to the PXI Systems Alliance, more than 100,000 PXI systems will be deployed by the end of 2009, and the number of deployed. | Core Animation Programming Guide Developer Contents About Core Animation 9 At a Glance 9 Core Animation Manages Your App s Content 10 Layer Modifications Trigger Animations 10 Layers Can Be Organized into Hierarchies 10 Actions Let You Change a Layer s Default Behavior 10 How to Use This Document 11 Prerequisites 11 See Also 11 Core Animation Basics 12 Layers Provide the Basis for Drawing and Animations 12 The Layer-Based Drawing Model 12 Layer-Based Animations 13 Layer Objects Define Their Own Geometry 14 Layers Use Two Types of Coordinate Systems 15 Anchor Points Affect Geometric Manipulations 17 Layers Can Be Manipulated in Three Dimensions 19 Layer Trees Reflect Different Aspects of the Animation State 21 The Relationship Between Layers and Views 24 Setting Up Layer Objects 26 Enabling Core Animation Support in Your App 26 Changing the Layer Object Associated with a View 27 Changing the Layer Class Used by UlView 27 Changing the Layer Class Used By NSView 28 Layer Hosting Lets You Change the Layer Object in OS X 28 Different Layer Classes Provide Specialized Behaviors 29 Providing a Layer s Contents 30 Using an Image for the Layer s Content 30 Using a Delegate to Provide the Layer s Content 30 Providing Layer Content Through Subclassing 32 Tweaking the Content You Provide 33 Working with High-Resolution Images 35 2013-01-28 2013 Apple Inc. All Rights Reserved. 2 Contents Adjusting a Layer s Visual Style and Appearance 35 Layers Have Their Own Background and Border 36 Layer s Support a Corner Radius 37 Layers Support Built-In Shadows 38 Filters Add Visual Effects to OS X Views 39 The Layer Redraw Policy for OS X Views Affects Performance 40 Adding Custom Properties to a Layer 42 Printing the Contents of a Layer-Backed View 42 Animating Layer Content 43 Animating Simple Changes to a Layer s Properties 43 Using a Keyframe Animation to Change Layer Properties 45 Specifying Keyframe Values 46 Specifying the Timing of a Keyframe Animation 46 Stopping an Explicit .

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