 	private var visiblePages = Set<ZoomingScrollView>()
     private var recycledPages = Set<ZoomingScrollView>()
 	private var currentPageIndex = 0
-    private var previousPageIndex = 0
-    private var previousLayoutBounds = CGRectMake(0.0, 0.0, 0.0, 0.0)
+    private var previousPageIndex = Int.max
+    private var previousLayoutBounds = CGRectZero
 	private var pageIndexBeforeRotation = 0
 	
 	// Navigation & controls

            naviCtl.setNavigationBarHidden(false, animated: animated)
        
            let navBar = naviCtl.navigationBar
            navBar.tintColor = navBarTintColor
            navBar.barTintColor = navBarBarTintColor
            navBar.shadowImage = nil

    public var hasBelongedToViewController = false
    public var isVCBasedStatusBarAppearance = false
    public var statusBarShouldBeHidden = false
    public var displayActionButton = true
    public var leaveStatusBarAlone = false
	public var performingLayout = false
	public var rotating = false
