toggle very slow when complex view will be shown about nappslidemenu

[crackukass]

Example : the application has 3 panels : left, center and right. The right panel is a calendar like iPhone onre (a scrollView composed of views, each view is a month of a year, each month is composed of labels.

The first time you slide to display the right panel, all is fine : fast and less cpu. But once the panel is closed and you want to reopen it, then all guy object is repainted and then consumption of cpu. Why ??

The workaround is described here ; but it's not great …

self.addEventListener("viewWillClose", function(e) {
if (Ti.API.VueCalendar && e.view == 'right') {
if (!backscreenView.displayed) {
backscreenView.image = Ti.API.VueCalendar.toImage();
Ti.API.helpRightWin.remove(Ti.API.VueCalendar);
Ti.API.helpRightWin.add(backscreenView);
backscreenView.displayed = true;
}
}
});
self.addEventListener("viewDidOpen", function(e) {
if (Ti.API.VueCalendar && e.view == 'right') {
if (backscreenView.displayed) {
Ti.API.helpRightWin.remove(backscreenView);
Ti.API.helpRightWin.add(Ti.API.VueCalendar);
backscreenView.displayed = false;
}
}
});

[viezel]

So performance wise, there are not much to do. This module uses the CoreAnimation Framework provided by Apple. If you find the animation slow, you might need to dig into your own code and figure out where the app is overdrawn.
You can use xCode Instruments for this purpose.