After splash screen, application freezes at white screen after killing the application and launching again in ionic ios

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Short description of the problem:

I have an ionic application with both the platforms in android and iOS. The problem is that when the iOS application is launched for the first time it works smoothly but when we kill the application or launch the application again after coming from the background the white screen is shown and the application seems to get freezes there after showing the splash screen. I am using the free provisioning profile to debug the application

What behavior are you expecting?

It should work normally and go to the intro view

Steps to reproduce:

1. launch the application from simulator then go to the tutorial view
2. move the application to the background
3. kill the application by swiping up
4. launch the application again , the splash screen comes and after that the application freezes at the white screen.

insert any relevant code between the above and below backticks

Other information: (e.g. stacktraces, related issues, suggestions how to fix, stackoverflow links, forum links, etc)

Which Ionic Version? 1.x or 2.x 1.x

Plunker that shows an example of your issue

For Ionic 1 issues - http://plnkr.co/edit/Xo1QyAUx35ny1Xf9ODHx?p=preview

For Ionic 2 issues - http://plnkr.co/edit/me3Uk0GKWVRhZWU0usad?p=preview

Run ionic info from terminal/cmd prompt: (paste output below)

cli packages: (/usr/local/lib/node_modules)

@ionic/cli-utils  : 1.19.2
ionic (Ionic CLI) : 3.20.0

global packages:

cordova (Cordova CLI) : 8.0.0 

local packages:

Cordova Platforms : android 6.4.0 ios 4.5.4
Ionic Framework   : ionic1 1.0.1

System:

Node  : v9.8.0
npm   : 5.6.0 
OS    : macOS High Sierra
Xcode : Xcode 9.2 Build version 9C40b 

Environment Variables:

ANDROID_HOME : not set

Misc:

backend : pro