Ionic 4 ios build constuctor not calling in app and splash screen not hidding

Ionic Framework
1

hi developers,

my issue on mac ios build in my app not contructor call and not even installize the app
in android it work properly .

In ios build when installed the build from xcode it open and showing splash screen laoding and loading not moving inside the application.

please help me out developer
thanku in advance ,

2

Usually in situations like this, there is an error in the JavaScript console.

3

I guess but when i rewrite the application in ios just copy paste the code in new application it works every thing working fine but i didn`t reconise the issue but i thing this issule is related to routing app