I was looking for a solution to removing lists of movieclips from the stage in as3. I had a go at adding the movieclips to an array and making a loop that removes each of them if they are present. I had to include the if contains because it was sending me back this without it: "Error #2025: The supplied DisplayObject must be a child of the caller."
var array: Array = new Array;
var symbol1: MovieClip = new Symbol1;
var symbol2: MovieClip = new Symbol1;
array.push(symbol1);
array.push(symbol2);
stage.addChild(array[1]);
for (var i = 0; i < array.length; i++) {
if (contains(array[i])) {
stage.removeChild(array[i]);
trace("removed symbol[i]");
}
}
Am I using arrays wrong?
Try with stage.contains(array[i])
For more modular code (you can reuse no matter the parent), try doing it this way:
for (var i = 0; i < array.length; i++) {
if (array[i].parent) { //check to see if this item has a parent
array[i].parent.removeChild(array[i]); //tell the parent to remove this child
trace("removed symbol [i]");
}
}
This way, if you decide later that you'd like to have all your items in a container instead of stage, you don't have to change the code.
Related
was wondering if someone could show me what I'm doing wrong here.
I have some old AS2 flash code I'm trying to get working.
First I create a few arrays in frame 1 of the main timeline like so-
var typeArr:Array = new Array();
for (var i:Number = 1; i < 5; i++)
{
_root.typeArr[i] = "data goes here";
}
Then I have a movieclip dynamically attached on the main stage that when clicked appends one of the arrays we created by pushing the string 'foo' to it-
stop();
_root.myType=3;//this can be any of our array numbers
this.onPress=function(){
var foo:String="test";
_root.typeArr[_root.myType].push(foo);
trace(_root.typeArr[_root.myType]);
}
Where _root.typeArr[_root.myType] is the array name and number _root.typeArr3, but pushing the data does not work and returns nothing.
However, if I test it directly using-
_root.typeArr[_root.myType]=foo;
It will store the data once (_root.typeArr3=test), so I can't see why it won't push to that array as multiple elements each time like- "test,test,test"
It's driving me crazy.
Thanks! :)
_root.typeArr[_root.myType] is equal to "data goes here" so you are pushing string to a string, which doesn't work.
If you would like to append the new string, you should do something like:
_root.typeArr[_root.myType]+=foo;
and you will get: data goes heretest
If you have different data structure instead of "data goes here" the key may lie in the format of this data.
var typeArr:Array = new Array();
// 'i' must start from 0 because the first element is typeArr[0]
for (var i:Number = 0; i < 5; i++)
{
typeArr[i] = i;
// trace(typeArr[i]); // 0,1,2,3,4
}
// trace(typeArr); // 0,1,2,3,4
myType = 3;
bt.onPress = function()
{
var foo:String = "test";
// push method puts the element at the end of your array
// typeArr.push(foo);
// trace(typeArr); // 0,1,2,3,4,test
// splice method replace the 4e element (index 3) of your array
typeArr.splice(myType, 1, foo);
trace(typeArr); // 0,1,2,test,4
}
here's my code.this prompts a exception saying "IllegalArgumentException: Children: duplicate children added: parent = Grid hgap=5.0, vgap=5.0, alignment=TOP_LEFT"
File file = new File("D:\SERVER\Server Content\Apps\icons");
File[] filelist1 = file.listFiles();
ArrayList<File> filelist2 = new ArrayList<>();
hb = new HBox();
for (File file1 : filelist1) {
filelist2.add(file1);
}
System.out.println(filelist2.size());
for (int i = 0; i < filelist2.size(); i++) {
System.out.println(filelist2.get(i).getName());
image = new Image(filelist2.get(i).toURI().toString());
pic = new ImageView();
pic.setFitWidth(130);
pic.setFitHeight(130);
gridpane.setPadding(new Insets(5));
gridpane.setHgap(5);
gridpane.setVgap(5);
pic.setImage(image);
hb.getChildren().add(pic);
}
Adding Items to a GridPane is a little different.
From the Docs
To use the GridPane, an application needs to set the layout
constraints on the children and add those children to the gridpane
instance. Constraints are set on the children using static setter
methods on the GridPane class
Applications may also use convenience methods which combine the steps
of setting the constraints and adding the children
So in your example, you first need to decide : How many images do I need in one row ?
Lets say your answer is 4, then your code becomes : (There are diff approaches to it, I am writing down the simplest one. You can use anything, loops for rows and colums being a good alternative ;)
)
//Can be set once, no need to keep them inside loop
gridpane.setPadding(new Insets(5));
gridpane.setHgap(5);
gridpane.setVgap(5);
//Declaring variables for Row Count and Column Count
int imageCol = 0;
int imageRow = 0;
for (int i = 0; i < filelist2.size(); i++) {
System.out.println(filelist2.get(i).getName());
image = new Image(filelist2.get(i).toURI().toString());
pic = new ImageView();
pic.setFitWidth(130);
pic.setFitHeight(130);
pic.setImage(image);
hb.add(pic, imageCol, imageRow );
imageCol++;
// To check if all the 4 images of a row are completed
if(imageCol > 3){
// Reset Column
imageCol=0;
// Next Row
imageRow++;
}
}
I'm using for to addEventListeners to all of the buttons. When I do so I get the message "value is not a function". What needs to be done?
var buttons:Array;
buttons = new Array("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","Æ","Ø","Å");
for (var i:int = 0; i < buttons.length; i++)
{
buttons[i].addEventListener(MouseEvent.CLICK, onKeyPress);
}
You need to use getChildByName("name") to get the reference to the object, if the values insde the array is name of element.
Try this,
var buttons:Array;
buttons = new Array("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","Æ","Ø","Å");
for (var i:int = 0; i < buttons.length; i++)
{
this.getChildByName(buttons[i]).addEventListener(MouseEvent.CLICK, onKeyPress);
}
In this case I have used this by considering that the elements are attached on current container.
buttons[i] is not an interactive object, it is a String. You cannot add an event listener to primitive types.
You have to use either references or instance names. If "A", "B", ... are your instance names, then you have to provide the full/relative path, e.g.: root.myClip[buttons[i]].addEventListener...
I have a game with in AS3 with a document class and a custom class which is attached to a movieclip in my .fla. Instances of that object are made multiple times/second. I want to delete those instances when, let's say, there are 100 of them. (because of performance problems after a while) The instances are stored in an Array after they are made.
You can remove them by using this.removeChild(obj); and obj is your object from array. So what you need is to loop through array and remove them.
That will remove all objects when objects are over 100.
if(array.length > 100)
{
for(var i:int = array.length - 1; i > -1; i--)
{
stage.removeChild(array[i]);// or any other parent containing instances
array.pop();
//array[i] = null; // if you want to make them null instead of deleting from array
}
}
Tip: Negative Loop (i--) is faster in performance than Positive Loop (i++).
Tip: pop() is faster in performance than unshift().
Update:
That will remove objects only if they are over 100, resulting in only 100 last objects remain on stage.
if(array.length > 100)
{
for(var i:int = array.length - 1; i > -1; i--)
{
if(array.length > 100)
{
stage.removeChild(array[i]);// or any other parent containing instances
array.unshift();// if you want to delete oldest objects, you must use unshift(), instead of pop(), which deletes newer objects
//array[i] = null; // if you want to make them null instead of deleting from array
}
}
/****** MyClass.as *********/
public class MyClass extends Sprite{
private var myVar:int=8567;
private function myClass():void{
//blablabla
}
public class destroy():void{
myVar = null;
this.removeFromParent(true); //method of Starling framework
}
}
/******** Main.as ****************/
public var myInstance:MyClass = new Myclass();
//Oh!! i need remove this instance D:
myInstance.destroy();
As a followup to the question, How to get associated URLRequest from Event.COMPLETE fired by URLLoader, how can I make the function work for loader object in a loop?
Here is my existing (rough) code; I always get the mylabel from the last element of the array.
var _loader = new Loader();
for (j = 0; j < 5; j++) {
//mylabel variable is correct setup in the loop
_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, function(e:Event):void {
doneLoad(e, mylabel);
});
_loader.load(new URLRequest(encodeURI(recAC[j].url)));
}//for loop
As per the comments above, this won't work because:
1) You're just adding the same event listener 5 times to the loader.
2) You're just reseting your same loader object 5 times.
The final output will just be as though you only called it the last time.
There are a variety of ways to address this - loading stuff asynchronously is one of the great mindfucks of learning to code - but the simplest way is probably just to create five separate loaders.
I'd do something like this:
var loaders:Array = [];
var labels:Array = ["label1", "label2", "label3", "label4", "label5"];
for (var j:int = 0; j < 5; j++) {
loaders[j] = new Loader();
loaders[j].contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler);
loaders[j].load(new URLRequest(encodeURI(recAC[j].url)));
}
function completeHandler(e:Event):void {
doneLoad(e.currentTarget, labels[loaders.indexOf(e.currentTarget)]);
}
The confusing part is finding a good way to keep track of which load is associated with which label etc, since in theory your loads can finish in any order. That's why I've got a separate label array there, and then you just match up the desired label with the loader that just finished loading.
I hope that helps!
the line belove should work but it returns -1, always.
loaders.indexOf(e.currentTarget);
Here my code
for(i; i < total; i++){
imgLoaderArray[i] = new Loader();
imgLoaderArray[i].contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, urlError);
imgLoaderArray[i].contentLoaderInfo.addEventListener(Event.COMPLETE, loaded);
imgLoaderArray[i].load(new URLRequest(xmlList[i].image));
}
function loaded(e:Event):void{
trace("index: "+imgLoaderArray.indexOf(e.currentTarget)); // return -1 every time
}