var exportFolder = "file:///D|/myPic/";
var fileURL = fl.browseForFileURL("open", "Select file");
var doc = fl.openDocument(fileURL);
var lib = fl.getDocumentDOM().library;
var libLength = lib.items.length;
var items=lib.items;
var userName = prompt("要导出类型-mc-bt-png-all", "png");
for(var i=0;i<libLength;i++){
switch(userName){
case "mc":
break;
case "bt":
break;
case "png":
if(lib.items[i].itemType=="bitmap"){
itemName=lib.items[i].name;
var pngName=itemName.substring(itemName.lastIndexOf("/")+1);
if(pngName.indexOf('.') == -1)
{
pngName += ".png";
}
fl.trace(pngName);
lib.items[i].exportToFile(exportFolder+pngName);
}
break;
case "all":
break;
}
}