IOS about UIKit column should be written in front of the words

IOS about UIKit should be written in front of the words

The beautiful Life of the Sun Vulcan (http://blog.csdn.net/opengl_es)

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If you have previously been exposed to Web, Windows, Linux, or other related interfaces directly to the user's application, you will be exposed to some of the components and systems available to draw and present information.

For web development, the Html language and Dom model, JavaScript language, and built-in libraries, CSS are effective tool libraries and languages for building Web pages. As for how each browser is presented and drawn, we don't need to be concerned about it.

The Windows system also provides the Win32 SDK, or the MFC class Library and GDI + for drawing.

As for Linux, commonly used as a server, but the current Ubuntu, Federa and other popular for the desktop and mobile phone operating system (although not fire up, at least Ubuntu can be used for handheld devices) to Xwindow as a graphical rendering of the service side to complete the interface rendering work.

From the above can be seen, with the interface of the operating system or interface rendering system, there is a set of development library for developers to use, in the program in accordance with their predetermined mode to call, to build a user interface can interact with the user.

and the Fine Research Institute found that there is an interface base class, the base class itself is through the drawing class library to complete its own drawing, and other interface components are directly or indirectly derived from the base class, but also using the drawing library-related methods on the basis of the base class interface, continue to complete the sub-class components of their respective styles and functions.

In addition, the interaction event, is also the interface component specific function, is not related to the drawing class library, but also implicated, the interface on the distribution of interactive events, will follow certain rules, some from the upper layer down, some from the outer layer to the inner layers, and some is from the inside out, or a variety of loops, events can be intercepted, That gives the developer a chance to cut into the internal event circulatory system, and can be processed or processed at the same time, the event will be put back into the event circulatory system, as in the circuit with a meter measurement, does not affect the original circuit normal power supply.

As for the way the animation is presented, it is nothing more than a plurality of buffer pictures to display the content, and then a frame to draw up, the use of visual persistence, to meet the visual enjoyment of human eyes.

In short, learning a new interface library, need to trace back, just a good outline cut collar, that can master the overall, but also in-depth details. From the drawing and interface root class, combined with the mechanism principle of event response processing, then deep into the various interface components or custom, will be confident and not disorderly.