Can't find background mode in Xcode (for my project) - xcode

MacOS 10.15 - Catalina
Flutter project
Xcode 11
I want to enable Background mode but as describe on documentation
enter link description here
But I can't find this setting in Xcode in my project
After click "+" nothing show:
After click on Capability "+" nothing show
[![enter image description here][4]][4]

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How to set up an app icon for a Command Line Tool written with Xcode and C++?

I am on OSX 12.2, and XCode 13.2.1. I created successfully a Command-line tool app written in C++ and wxwidgets library to add the GUI interface. I inserted the images for the app icon in Images > AppIcon, see the screenshot attached. However, when I run the app there is a 'blank' icon as shown in the second screenshot attached.
How may I get the desired icon to appear ?
Thanks!

iPhone (iOS 12) Keyboard disappeared automatically when click on input tag when build app using Xcode 10.1

I am developing a Hybrid Application using Cordova with MFP.
Recently we upgraded the Xcode version from 9.4.1 to 10.1 after that facing an issue is when key in on input tag then the keyboard is appearing from the bottom and suddenly disappeared but this is working normal below IOS 12 version even build app using Xcode 10.1.
I am using native keyboard instead of Cordova plugin keyboard and UIWebView.
After removing the viewport-fit=cover as mentioned in "https://github.com/apache/cordova-ios/issues/417#issuecomment-423326624" the keyboard is appearing from the bottom as normal but the keyboard is overlaid on the input tag so could not see what we are typing in the input.
And also tried with "https://github.com/apache/cordova-ios/issues/417#issuecomment-428705830" but not working.
We expecting the result is while key in on input the keyboard should appear from the bottom and need to be disappear once key in finished.

Xcode 7.3 does not show up any downloadable iOS simulator

Just upgrade my Xcode from 7.2.1 to 7.3. Have no idea why. Do I have choices other than delete Xcode and reinstall again? (which I highly don't like).
BTW, the documentation tab is fine. Just a blank simulators.
Update: If I click "check and isntall now", it reports:
Could not download and install OS X 10.11.4 Documentation. The certificate for this server is invalid. You might be connecting to a server that is pretending to be “devimages.apple.com.edgekey.net” which could put your confidential information at risk.
I checked cert on https://devimages.apple.com.edgekey.net, seems fine..
In Xcode 7.3 I found the following way to add older simulator versions.
1.) Choose "Window" from the menu bar
2.) Choose "Devices" from the drop down menu list
Result: Devices window opens
3.) Click the "+" icon in the lower left-hand corner of the window.
4.) Choose the Add Simulator option
Result: You can add a simulator (and download older ones).

The Simulator select button can't find

My Mac system is El Capitan 10.11.2,in Xcode 7.2,I can look the simulator; but when I install Xcode 6.4,open project (every project like it),I can't find Simulator button.
Go to Window and then Devices, check if it appear there and if not - click the + icon in the lower left

Errors in cordova+xcode ios build

I am getting the following errors in Application Loader when trying to deliver my app(built in vs2015+cordova+remote xcode 7):
Thanks in advance.
There appears to be an issue with Cordova's iOS implementation when publishing apps created specifically using Xcode 7.
A Cordova community member has published a "cordova-plugin-ipad-multitasking" plugin with a fix.
http://npmjs.com/package/cordova-plugin-ipad-multitasking
Install this plugin and you should be all set. A future Cordova version will resolve the problem fully.
Failing that, if you are using remotebuild you can also find the native project under ~/.taco_home/remote-builds/taco-remote/builds and make the modifications as described in the Cordova bug on the issue.
EDIT:
To resolve ITMS-90339, there is a second step you can do to patch in the near term. Grab the build.xcconfig from the 3.9.x branch of the cordova-ios repo and place this under res/native/ios/cordova
Now remove this line:
CODE_SIGN_RESOURCE_RULES_PATH = $(SDKROOT)/ResourceRules.plist
Note that you will want to remove this custom build.xcconfig file if you upgrade to the version with the full patch that is forthcoming.
By default Cordova doesn't fulfill all of the requirements for multitasking support. (CB-9161) You can follow the steps on that issue to make changes directly to the iOS project for multitasking support.
Use Xcode 7 (Cordova always uses the current SDK)
Click your Project icon in the Project Navigator
Click on your Target
Select the "General" tab
Go to the "Deployment Info" section
Select the "iPad" button segment
For "Device Orientation", select all four checkboxes (Portrait, Upside Down, Landscape Left, Landscape Right)
Add a new File: Launch Screen --> "Launch Screen.storyboard"
Click your Project icon in the Project Navigator
Click on your Target
Select the "General" tab
Go to the "App Icons and Launch Images" section
Select "Launch Screen.storyboard" from the "Launch Screen File" dropdown

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