iphone - How do I unload a UIViewController from a UIScrollView? -

i using pretty same code load uiviewcontroller (called lessonscrollview) uiscrollview. method called when in scrollviewdidscroll method

- (void)loadscrollviewwithpage:(int)page {  if (page < 0)     return; if (page >= numpages)     return;  lessonscrollview *controller = [imageviewcontrollers objectatindex:page]; if ((nsnull *)controller == [nsnull null]) {     controller = [[lessonscrollview alloc] initwithpage:page forlesson:[self title]];     [imageviewcontrollers replaceobjectatindex:page withobject:controller];     [controller release]; }  if (controller.view.superview == nil) {     cgrect frame = cgrectmake(0, 80, 320, 285);     frame.origin.x = frame.size.width * page;     frame.origin.y = 0;     controller.view.frame = frame;     [scrollview addsubview:controller.view]; } 

}

in circumstances have quite few pages, believe, remain in memory until uiviewcontroller responsible scrollview released (or memory warning occurs).

my question is, how release lessonscrollview object. call method called,

- (void)unloadscrollviewwithpage:(int)page  

in scrollviewdidscroll , page current page - 1.

thanks can offer.

try this:

[controller.view removefromsuperview];//to release controller's view [imageviewcontrollers replaceojectatindex:page withobject:[nsnull null]];//to release actual controller should lead being dealocated