Example: Flash Vars

If you wish to obtain parameters from FlashVars, you have to create a LoaderInfo object in Actionscript and access its property “parameters”, which is an object that contains name-value pairs representing the parameters provided to the loaded SWF file.

Create a folder inside Assets called “ActionScript”. Now create an empty textfile called “FlashVars.as” inside this folder, and insert the following code.

ActionScript 3

package {
    import com.unity.UnityNative; 
    import flash.display.LoaderInfo;
        
    public class FlashVars {
        public static function Join(delimiter: String): String {
            var parameters: Object = LoaderInfo(UnityNative.stage.loaderInfo).parameters;
            var text: String = "";
            for (var key: String in parameters)
                text += (text.length ? delimiter : "") + key + "=" + parameters[key];
            return text;
        }
    }
}

This Actionscript function will obtain the FlashVars and concatenate the name-value pairs into a string that can be passed to Unity. Call the function and parse the returned list of parameters in a table.

C#

string parameters;
Dictionary<string,string> paramTable;
    
parameters = UnityEngine.Flash.ActionScript.Expression<string>("FlashVars.Join('|')");
string[] list = parameters.Split('|'); 
paramTable = new Dictionary<string, string>();
        
foreach (string parameter in list) {
    string key = parameter.Substring(0, parameter.IndexOf('='));
    string val = parameter.Substring(parameter.IndexOf('=') + 1);
    paramTable.Add(key, val);
}

The parameters string and parameters table are defined first. The table is a dictionary of string keys and values that will contain the FlashVars. Then the Actionscript function is called, and the name-value pairs are extracted from parameters and added to the table. Now you can read the parameters in you application. In the following example some values are shown and a given scene will be loaded as defined in FlashVars.

C

void OnGUI () {
    GUILayout.Label(" FlashVars = " + parameters);
    GUILayout.Label(" unitydebug = " + paramTable["unitydebug"]);
    GUILayout.Label(" deeptrace = " + paramTable["deeptrace"]);
    
    if (GUILayout.Button("Click here to load " + paramTable["scene"]))
        Application.LoadLevel(paramTable["scene"]);
}

Build the project for the first time to generate an HTML file, and edit its FlashVars for IE and other browsers (two different lines).

HTML

<param name="flashvars" value="unitydebug=false&amp;deeptrace=false&amp;scene=Scene1" />

Finally open the HTML file in a browser to run the project.

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