iOS: Fix accessibility leak

Change-Id: I359ce521decbbb06376fc48689762f462c8706b0
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

src/plugins/platforms/ios/quiview.mm

@@ -62,10 +62,11 @@
 
 - (id)initWithQIOSWindow:(QT_PREPEND_NAMESPACE(QIOSWindow) *)window
 {
-    if (self = [self initWithFrame:window->geometry().toCGRect()])
+    if (self = [self initWithFrame:window->geometry().toCGRect()]) {
         m_qioswindow = window;
+        m_accessibleElements = [[NSMutableArray alloc] init];
+    }
 
-    m_accessibleElements = [[NSMutableArray alloc] init];
     return self;
 }
 
@@ -104,6 +105,13 @@
     return self;
 }
 
+- (void)dealloc
+{
+    [m_accessibleElements release];
+
+    [super dealloc];
+}
+
 - (void)willMoveToWindow:(UIWindow *)newWindow
 {
     // UIKIt will normally set the scale factor of a view to match the corresponding

src/plugins/platforms/ios/quiview_accessibility.mm

@@ -50,7 +50,7 @@
         return;
     QAccessible::Id accessibleId = QAccessible::uniqueId(iface);
     UIAccessibilityElement *elem = [[QMacAccessibilityElement alloc] initWithId: accessibleId withAccessibilityContainer: self];
-    [m_accessibleElements addObject: elem];
+    [m_accessibleElements addObject:[elem autorelease]];
 }
 
 - (void)createAccessibleContainer:(QAccessibleInterface *)iface