Overlay for drawer - objective-c

I am implementing drawer in my project. I used SWRevealViewController custom class.Its working fine.But i need to put overlay for front view. While clicking menu icon front view should be black.I want to design overlay like play store.

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React native container subpages navigation

I am creating a React native application with the following scenario:
There is a navigation bar at the bottom of the screen, allowing the user to navigate between three main pages. On one of these pages, there is a backdrop with a container overlayed on it with two buttons. Each of these buttons should show open different "pages" in that container, and the navigation bar will be hidden when the user opens one of those "pages". An image is included below.
App layout example
My question is: how is this best implemented in react native?
My original idea was to implement a custom Stack Navigator with createStackNavigator. While this does work, I was wondering if this is a good way to go about it.
One result from using a custom navigator is that the navigation state in the container is also bound to the back button of the device (on Android). However, this is a welcome feature in this case as it makes sense in the navigation flow.

Is there a special name for a toolbar like thing at the bottom of Instagram?

The attached Instagram snapshot has a collection of buttons like Home, Search, Add etc. at the very bottom. What is this component called? Is it called tab navigator? Any special name for it?
iOS calls this a Tab Bar, which appears at the bottom of an app screen and is used for navigation between an app's various functions.
It's not the same as a Toolbar, which appears at the bottom of an app screen and contains actions relevant to the current view.

implement slide from right menu like facebook app

how to open new view from navigation slider ios. example like in facebook page there is navigation slider and in navigation slider there are profile,message etc.when we click on message and profile then there is new view ,similarly please let me know how to load new view from navigation slider?
From this tutorial:
http://github.com/mikefrederick/MFSideMenu
MFSideMenu project utilizes view controller and gives you a simple API demonstration for implementing side-menu functionality like facebook app.
This is a good tutorial : http://www.appcoda.com/ios-programming-sidebar-navigation-menu/
The menu slides in from the left, however it should be relatively simple to change this so it enters from the right.

objects inside Ext.tab.Panel

I am writing simple apps with Sencha Touch 2. I see that the basic object in app/view/Main.js is Ext.tab.Panel.
What other Ext objects can be embedded directly into Ext.tab.Panel? Where can I look up this information?
From the Sencha Touch 2.3.1 docs, Ext.tab.Panel section:
http://docs-origin.sencha.com/touch/2.3.1/#!/api/Ext.tab.Panel
Tab Panels are a great way to allow the user to switch between several
pages that are all full screen. Each Component in the Tab Panel gets
its own Tab, which shows the Component when tapped on. Tabs can be
positioned at the top or the bottom of the Tab Panel, and can
optionally accept title and icon configurations.
Basically, you can put any view class which is subclass of Ext.Container inside a tab panel.
You can put any view you want.You can even put another container inside a container
Have a look at sencha touch docs.
http://docs.sencha.com/touch/2.3.1/#!/guide/views

Tabbar as main view (left side) of splitview controller

Just like the Dropbox app for iPad I want to add Tabbar in the main view controller of splitview.. wondering what is the best way to achieve this?
Checkout the screen grab of ipad dropbox app... I am referring to the tabbar used on bottom left.
Select the Navigation Controller of your Split View Controller in Xcode and in the properties panel it will give you checkboxes to enable/disable top navigation bar and bottom toolbar for it (Dropbox app in your screenshot have both, so you should check both of them if you need the same layout).