Xcode

Dear users,good morning. I have already putted my iPhone app in App Store, and it is already approved and in sale.Now, I have done a little change (the text of two message box and the correct color / alignement of one label; nothing else). This is only a build, not a new version, so I would avoid the long approval process, and I would update this new version only as a new build.I have tried to upload it with the same procedure (in the same conditions!) which I have already followed during my first upload of my first main version; but, incredibly, it doesn't work; and I see the error message which you can see in the screenshot which I have putted in my dropbox account and which you can see by the following link.Why happend? How can I fix it? Thank in advance!https://www.dropbox.com/s/p37pt4wxhwx7sz1/sc-10.png?dl=0

I was just playing around with the iPhone X simulator in Xcode, and I realized one of my apps has a view bug. I have a button placed with code (at the bottom of the screen in the middle) that is overlapping the bar that you swipe up to get to the home screen. Is there a way to detect, through code, if the device is an iPhone X, and an iPhone X only, so I can write code to counteract the bug? Maybe by detecting the precise screen width and height, and if so, what are those numbers? Thanks in advance. Any help is appreciated.

Yes I know x code only works with macs but my computer recently took water damage and I don’t have money for another Mac so I’m just going to buy a windows for work but if there’s any way to run Xcode with windows I’d like to know please. Thanks in advance

I have an app that I'm using for my own purposes and is not in the app store. I would like to run an http server in the background for more than the allotted 3 minutes to allow persistent communications with a connected Bluetooth device. The Bluetooth device would poll the service at intervals. Is this possible to do? This app does not need app store approval since it's only for personal use.