Adobe Extending Flash Professional CS4 Manual do Utilizador descarregar pdf (Página 284)

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EXTENDING FLASH CS4 PROFESSIONAL

FLfile object

See also

FLfile.remove(), FLfile.write()

FLfile.exists()

Availability

Flash MX 2004 7.2.

Usage

FLfile.exists(fileURI)

Parameters

fileURI A string, expressed as a file:/// URI, that specifies the file you want to verify.

Returns

A Boolean value of true if successful; false otherwise.

Description

Method; determines whether a specified file exists. If you specify a folder and a filename, the folder must already exist.

To create folders, see

FLfile.createFolder().

Examples

The following example checks for a file called mydata.txt in the temp folder and displays an alert box indicating

whether the file exists:

var fileURI = "file:///c|/temp/mydata.txt";

if (FLfile.exists(fileURI)) {

alert( fileURI + " exists.");

}

else {

alert( fileURI + " does not exist.");

}

The following example checks to see if a required configuration file exists in the MyApplication folder. If the file

doesn’t exist, it is created.

var configFile = "file:///C|/MyApplication/config.ini";

if (!FLfile.exists(configFile)) {

FLfile.write(configFile,"");

}

See also

FLfile.write()

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