IOS App starts with iPhone 4s layout on greater devices [duplicate] - ios

This question already has answers here:
iOS 9 Xcode 7 - Application appears with black bars on top and bottom
(17 answers)
Closed 7 years ago.
I just wanted to ask why my app is starting with a too small size on devices other than iPhone 4s on my simulator? Is there something wrong related to the constraints I set or general project difficulties?

You must set your launch images. At least set them for iphone 6 and you should solve the issue

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Unable to solve issue in simulator device [duplicate]

This question already has answers here:
iOS 9 Xcode 7 - Application appears with black bars on top and bottom
(17 answers)
Closed 6 years ago.
My project UI work well for simulator 4s and also splash screen showing while running
but when I run on 5s or 6s device splash screen not showing and blank spaces appears header and footer of the view...
here is my 4s device simulator UI-
and this is 5s simulator UI-
You need to create the different size of launch screen image or launch screen from interface builder.
Please have a look this link

Compiling and older app to iPhone 6s shows a lower resolution [duplicate]

This question already has answers here:
Black bars on launch screen on iPhone5 (and iPhone6)
(2 answers)
Closed 7 years ago.
Just got an iPhone 6S and started adjusting my project to it.
Somehow, when compiled and debugged on my iPhone, the view seems much smaller (like 4s).
Xcode: 7.1.1
iOS: 9.0.1
IPHONE: 6S
Anyone knows that went wrong?
Thanks,
You need to include launch images for all the iPhone sizes if you want the app to use the native screen size. The easiest way to do this is to migrate your launch images into an asset catalog.

iPhone 6 vs >iPhone 5 nav bar heights [duplicate]

This question already has answers here:
How to enable native resolution for apps on iPhone 6 and 6 Plus?
(8 answers)
Closed 8 years ago.
When running one of my apps on the iPhone 6, I've noticed the nav bar height of my app is taller than the nav bar height of a system app (ex Settings). While looking at some third party apps, I've noticed some apps have the same nav bar height as system apps (Twitter), and some apps have the same problem I do (Instagram).
This makes me believe that some of the apps are explicitly optimizing for iPhone 6, and some apps are just being scaled by the platform. Is there a specific way to optimize for iPhone 6?
This isn't an iOS 8 problem, as I've ran my app on an iPhone 5 running iOS 8 and the nav bars matched.
You have to provide launch images for iPhone 6 and 6+ (or a launch xib file). See here: How to enable native resolution for apps on iPhone 6 and 6 Plus?

Why Apps icon disappear after update iOS 7. [duplicate]

This question already has answers here:
How do you update the app icons and launch images to support IOS 6 and 7 simultaneously?
(6 answers)
Closed 9 years ago.
I match a strange problem,when device update iOS 7, my Apps icon disappear and iOS 6 is ok.
Anything setting error? or miss piex image ?
Thanks advance!
For IOS 7 you need to add a new icons.
Add new images in the size of 76x76 , 120 x 120 and 152x 152
Refer this

Do apps need to be modified for the iPhone 5's screen? [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How to deal with iPhone 5 screen size?
The iPhone 5 has a bigger screen than all previous models (4 inches instead of 3.5). How will this affect current apps that were designed for the original screen when they're displayed on the iPhone 5?
I ask because I am withholding the launch of a new app of mine and am wondering if I need to make modifications for iPhone 5 screen-wise.
Existing apps will run in a compatibility mode, and will be presented in a "letterbox" format.

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