切换主视图
hi ， 我想改变这个例子程序的主视图，appui代码里，我自己建立了一个view实例，在下面倒数第四行，我改的ActivateLocalViewL( viewSel->Id() );
，但是显示的还是原来的viewMain视图，请问我是不是没改对？
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void CAknExGridAppUi::ConstructL()
{
//BaseConstructL();
BaseConstructL( EAknEnableSkin );

// Create a main view
CAknExGridView* viewMain = CAknExGridView::NewL();
AddViewL( viewMain ); // transfer ownership to CAknViewAppUi

// I Create a view for selection grid
CAknExGridViewAsSelection* viewSel =
CAknExGridViewAsSelection::NewL();
AddViewL( viewSel ); // transfer ownership to CAknViewAppUi




// Show tabs for main views from resources
CEikStatusPane *sp = StatusPane();

// Fetch pointer to the default navi pane control
iNaviPane = (CAknNavigationControlContainer*)sp->ControlL(
TUid::Uid( EEikStatusPaneUidNavi ) );


iDecoratedTabGroup = iNaviPane->ResourceDecorator();
if ( iDecoratedTabGroup )
{
iTabGroup = ( CAknTabGroup* ) iDecoratedTabGroup->DecoratedControl();
}

// set a view
if ( iTabGroup )
{
ActivateLocalViewL( TUid::Uid( iTabGroup->ActiveTabId() ) );
}
else // just in case
{
ActivateLocalViewL( viewSel->Id() );
//ActivateLocalViewL( viewMain->Id() );
}
}

[解决办法]
Try：
if ( iTabGroup )
{
ActivateLocalViewL( viewSel->Id() );
}