MACROMEDIA FLASH MX, Справочник

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852 Chapter 2: ActionScript Language Reference
Usually you should find that the default value of
System.exactSettings
is fine. Often your
only requirement is that when a SWF file saves a shared object in one session, the same SWF file
can retrieve the same shared object in a later session. This situation will always be true, regardless
of the value of
System.exactSettings
. But you might want to change
System.exactSettings
from its default so that a SWF file published for Flash Player 7 or later can retrieve shared objects
originally created by a SWF file published for Flash Player 6. Because the player has stored the
shared objects created by the Flash Player 6 SWF file in a folder that’s specific to the superdomain
of that SWF file, you should use superdomain rules for shared object retrieval in your Flash
Player 7 SWF file. This step requires specifying
System.exactSettings = false
in your Flash
Player 7 SWF file. It is also possible that you might have SWF files that are published for Flash
Player 6 and Flash Player 7 SWF files that share the same shared object data. In this case, simply
pick a value for
System.exactSettings
(either
true
or
false
) and use it consistently in your
Flash Player 6 and Flash Player 7 SWF files.
Example
The following example shows how to specify superdomain matching rules:
System.exactSettings = false;
See also
SharedObject.getLocal() , System.showSettings()