iOS: add convenience function to get to the root QIOSViewController

It seems that we need to access our view controller from many
places, and the syntax to do so is tricky to remember. So lets
just add it to our global functions, with the added bonus of a
using a little cache.

Note: many of these functions could be made inline, but since one
concern of the plugin will be the end size of the app, I prefer
to trade size for speed at this point. We can always change this
later.

Change-Id: I578ea9ae8218d23d635b7728a930763ca53c4eaa
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plugins/platforms/ios/qioswindow.mm b/src/plugins/platforms/ios/qioswindow.mm
index af184e2e7b..71816f7d94 100644
--- a/src/plugins/platforms/ios/qioswindow.mm
+++ b/src/plugins/platforms/ios/qioswindow.mm
@@ -197,7 +197,7 @@ QIOSWindow::QIOSWindow(QWindow *window)
     , m_devicePixelRatio(1.0)
 {
     if (isQtApplication())
-        [[UIApplication sharedApplication].delegate.window.rootViewController.view addSubview:m_view];
+        [rootViewController().view addSubview:m_view];
 
     setWindowState(window->windowState());