最簡單的辦法是通過CCoeControl::MakeVisible()函數改變Container的可見性:
1. 在AppUi::ConstructL()裡建立兩個Container類的執行個體,并調用AddToStackL()将它們加入到Constrol Stack中,然後隐藏暫時不顯示的Container
void CMyAppUi::ConstructL()
{
BaseConstructL();
iContainer1 = CMyContainer1::NewL(ClientRect());
iContainer2 = CMyContainer2::NewL(ClientRect());
AddToStackL(iContainer2);
AddToStackL(iContainer1);
iContainer2->MakeVisible(EFalse);
}
2.在接收到指令後切換兩個Container的可見性
void CMyAppUi::HandleCommandL(TInt aCommand)
{
switch(aCommand)
{
case ESwitchToContainer2:
{
iContainer2->MakeVisible(ETrue);
iContainer1->MakeVisible(EFalse);
break;
}
case EEikCmdExit:
case EAknSoftkeyExit:
{
Exit();
break;
}
default:
{
// Panic(EHelloWorldBasicUi);
break;
}
}
}
3. 在AppUi的析構函數中調用RemoveFromStackL()将兩個Container從Control Stack中移除并delete掉。
CMyAppUi::~CHelloWorldAppUi()
{
if (iContainer1)
{
RemoveFromStack(iContainer1);
delete iContainer1;
}
if (iContainer2)
{
RemoveFromStack(iContainer2);
delete iContainer2;
}
}
另一個辦法是一開始隻建立Container1,等用到Container2時再建立Container2,并銷毀Container1。