SetWindowSize on IOS

Hello all,
I’am new in Cinder,
I decide try some simples stuffs but…it’s seems not good. I need some help.

I try to change the display size …the window Size on IOS.
I did try two methods:
First by a settings in a preparesettings fly function and settings->setWindowSize(1080,1920)
Second by a simple setWindowSize from the App class.

My console out always a 736 x 414 window size.
It’s normal ?

the strange thing is that resolution look fine…smooth.

I have tried to put distance in z with cameraPersp and CameraUI but nothing…
Some Help please.