Flash Basics Tutorials-Movie clip symbols, button symbols, graphic symbols

　　This tutorial introduces the most basic three kinds of components in Flash: Movie clip components, button components, graphic components.

　　1. The concept

　　A symbol is a graphic, button, or movie clip created in Flash and saved in a library, which can be reused throughout a movie or other movie, and is the most basic element in Flash animation;

　　Movie clip Symbol --it can be understood as a small movie in a movie that can be completely independent of the main scene timeline and can be played repeatedly.

　　button Symbol --it's actually a 4-frame movie clip, but its timeline can't play, just a simple response based on the mouse pointer's action, and go to the appropriate frame. Realize the powerful interactivity of flash movies by adding action statements to the button instances on the stage.

　　graphic Symbols -A static image that can be reused, or a repeatable animated segment connected to the main movie timeline. The graphic symbol runs synchronously with the movie's timeline.

　　2. The same point

The same point of several components can be reused, and when you need to modify a reused element, just edit the symbol without having to modify all the instances of the component, and flash updates all instances of the component based on the modified content.

　　3. Differences and applications need to pay attention to problems

1 film clip components, button components and graphic components, the main difference is that the movie clip components and button elements can be added to the example of action statements, graphic elements on the case is not;

Action statements can be added to key frames in a movie clip, and button symbols and graphic symbols cannot.

2 the movie clip element and the button element can join the sound, the graphic element cannot.

3 the movie clip element's playback is not subject to the scene time line length restriction, it has the component own independent time line, the button symbol unique 4 frame time line does not play automatically, but responds to the mouse event only, the graphics component's playback completely is subjected to the scene time line;

4 film clip components in the scene of the hit return test can not see the actual playback effect, only in their own editing environment to watch the effect, and the graphic elements in the scene to be able to see timely, to achieve the results of WYSIWYG.

5 The instances of three components on the stage can change their behavior in each other in the property panel, or they can exchange instances.

6 film clips can be a set of another film clips, graphics components can also be a set of other graphic elements, but the button elements can not be a set of another button components, three components may be set together.