Introduction to iOS graphics and image technology Core Animation

DiscussionIOS imageTechnologyCore AnimationIt is the content to be introduced in this article.IOSProvides a seriesImageTechnology, which is the basis for building a mobile visual experience. A specific frame-processing 2D, 3D, and animated effects-allows your apps to access the exceptional graphics features of the iPhone and iPod touch.

Core Animation

Based on the simple programming model of merging independent layers, you can use Core Animation to create an animated user experience. Animation is created according to the defined key steps. The steps describe how the text layer, image layer, and OpenGL ES graphics interact. Core Animation follows predefined steps during runtime to smoothly move the visual element from one step to the next step and automatically fill in the Transition frame in the Animation.

Like switching in many scenarios in iOS, you can also use Core Animation to create eye-catching effects, such as moving user interface elements smoothly on the screen, add the effect of gradual Import and Export-only a few lines of Core Animation code are required.

OpenGL ES

With hardware accelerationOpenGLElasticsearch APIs use the powerful graphic processing capabilities of the iPhone and iPod Touch.OpenGLES has a simpler APL than its desktop version, but uses the same core concept, including programmable coloring devices and other extensions that can stand out from your 3D programs or games.

Quartz 2D

Quartz 2D is a powerful 2D graphic API in iOS. It provides professional 2D graphic functions, such as the besell curve, transformation and gradient. Using Quartz 2D to customize interface elements can bring personalized appearances to your programs. Since Quartz 2D is an image model based on portable document formats (PDF), displaying PDF files is also a piece of cake.

Independent Resolution

The iPhone 4 high-pixel Retina screen makes text and images of any size appear smooth and smooth. If you need to support the early iPhone, you can use the Independent Resolution in the iOS SDK, which allows the application to run in different screen resolution environments. You only need to slightly modify the icons, graphics, and code of the application to ensure that it has excellent visual effects on a variety of iOS devices and will achieve the best on iPhone 4 devices.

Photo Gallery

Applications can access users' photo libraries through UIKit. For example, you can browse the user's photo library through the photo selector interface, select an image, and then return to the application. You can determine whether to allow users to drag or edit the returned image. In addition, UIKit also provides the camera interface. Through this interface, the application can directly load the photos taken by the camera.

Summary:IOS imageTechnologyCore AnimationAfter the introductionIOSOfImageDoes technology have a certain understanding of its content. I hope this article will help you.