Script showing how to clean a view inside a window (like a scrollview)

app.js

// INcluding memory management utils.
Ti.include('utils.js');
 
// root window.
var win = Ti.UI.createWindow({
    backgroundColor : 'white',
    exitOnclose : true,
});
 
if (Ti.UI.Android) {
    win.windowSoftInputMode = Ti.UI.Android.SOFT_INPUT_ADJUST_PAN;
}
 
function createRow(i) {
    var row = Ti.UI.createView({
        backgroundColor : 'white',
        borderColor : '#bbb',
        borderWidth : 1,
        width : '100%',
        height : 70,
        top : 0,
        left : 0
    });
    var inputTextField = Ti.UI.createTextField({
        hintText : 'Enter value ' + i,
        keyboardType : Ti.UI.KEYBOARD_NUMBERS_PUNCTUATION,
        top : 10,
        left : '10%',
        width : '80%',
        height : 60
    });
    row.add(inputTextField);
    return row;
}
 
var label = Ti.UI.createLabel({
    backgroundColor : 'darkgray',
    text : 'remove',
    textAlign : 'center',
    bottom : 0,
    left:0,
    width : Titanium.UI.FILL / 2,
    height : 100
});
 
var label2 = Ti.UI.createLabel({
    backgroundColor : 'darkgray',
    text : 'create',
    textAlign : 'center',
    bottom : 0,
    left : Titanium.UI.FILL / 2 + 1,
    width : Titanium.UI.FILL / 2,
    height : 100
});
 
win.add(label);
win.add(label2);
 
var scrollView;
 
label.addEventListener("click", function() {
    win.remove(scrollView);
    Ti.API.info(scrollView.getChildren().length);
    alert(scrollView.getChildren().length);
    clean(scrollView);
    scrollView = null;
});
 
label2.addEventListener('click', function() {
 
    scrollView = Ti.UI.createScrollView({
        bottom : 120,
        contentHeight : 'auto',
        layout : 'vertical'
    });
    Ti.API.info(scrollView.getChildren().length);
    alert(scrollView.getChildren().length);
    for (var i = 0; i <= 20; i++) {
        var row = createRow(i);
        scrollView.add(row);
    }
    win.add(scrollView);
 
});
 
win.open();

utils.js

/// Recursive Clean of Memory
// by Mauro Parra
// https://gist.github.com/mauropm/2655813
// Begin recursive clean of memory
function do_clean(e, c) {
    clean(c);
    e.remove(c);
    c = null;
    Ti.API.info('Deleted child at do_clean');
    return;
}
 
function clean(e) {
    if (e != null) {
        if (e.children) {
            Ti.API.info('Number of children: ' + e.children.length);
            for (var i = 0; i < e.children.length; i++) {
                do_clean(e, e.children[0]);
            }
        } else {
            return;
        }
    }
}
 
// End recursive clean of memory
 
/// <<< Register & UnRegister Event Listeners
// Original from: https://gist.github.com/minhnc/2333095
// Thanks minhnc!
 
/**
 * params: {event: 'event', callback: eventCallback}
 */
function registerEventListener(obj, params) {
    if ( typeof obj._eventListeners == 'undefined') {
        obj._eventListeners = [];
    }
 
    obj.addEventListener(params.event, params.callback);
 
    var eventListeners = obj._eventListeners;
    eventListeners.push(params);
    obj._eventListeners = eventListeners;
 
    Ti.API.info(JSON.stringify(obj._eventListeners));
}
 
function unRegisterAllEventListeners(obj) {
    if ( typeof obj._eventListeners == 'undefined' || obj._eventListeners.length == 0) {
        return;
    }
 
    for (var i = 0, len = obj._eventListeners.length; i < len; i++) {
        var e = obj._eventListeners[i];
        obj.removeEventListener(e.event, e.callback);
    }
 
    obj._eventListeners = [];
}
 
/// Register & UnRegister Event Listeners >>>
 
// Begin win2 clean (all secondary windows are named win2)
 
// Function to clean the win2 (i.e., remove all the attached listeners, close it, null it)
function win2Clean() {
    if (win2 != null) {
        win2.close();
        clean(win2);
        unRegisterAllEventListeners(win2);
        win2 = null;
    }
    Ti.App.removeEventListener('win2:close', win2Clean);
}
 
function win2Close() {
    Ti.App.fireEvent('win2:close');
}