Heard that splash/Launch images are necessary for ios apps,otherwise it will be rejected. I have included splash screen as the starting page background image with a delay of 2 seconds. Will it be a problem for rejection without adding as a launch images in xcode settings.
splash screen is necessary to be added in xcode rather than an image as first page
Yes it will be rejected. You must provide launch images or a launch screen. Do not introduce artificial delays. You want your app to launch as quickly as possible. (And reading between the lines, the launch image is *NOT* a "splash screen" - it shouldn't be used for advertising or showing some company logo. It should be a bare-bones representation of your app's initial UI to give the impression of faster launching.)
Certain launch images are mandated to set flags for native device support. Even if you made it thru review, I don't think the results would please anyone. Be sure to test on all devices your app claims to support.
What does your proposed splash screen provide?If it's just an ad, your users may not appreciate it, especially if they see it all the time.