How different problems with flutter 2 on some of my apps - flutter

Question

I have several problems after updating to flutter 2 someone can help me solve them, I list the log below
Flutter console error:
objc[88773]: Class AMSupportURLConnectionDelegate is implemented in both ??
(0x1f9b08188) and ?? (0x113d382b8). One of the two will be used. Which one is undefined.
objc[88773]: Class AMSupportURLSession is implemented in both ?? (0x1f9b081d8) and ??
(0x113d38308). One of the two will be used. Which one is undefined.
** BUILD FAILED **
Xcode's output:
↳
Command CompileSwift failed with a nonzero exit code
In file included from
/Users/user/.pub-cache/hosted/pub.dartlang.org/shared_preferences-0.4.3/ios/Classes/
SharedPreferencesPlugin.m:5:
/Users/user/.pub-cache/hosted/pub.dartlang.org/shared_preferences-0.4.3/ios/Classes/
SharedPreferencesPlugin.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
#import <Flutter/Flutter.h>
^~~~~~~~~~~~~~~~~~~
1 error generated.
Command CompileSwift failed with a nonzero exit code
Command CompileSwift failed with a nonzero exit code
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Analyzing workspace
note: Constructing build descriptionuser

Answer 1

I had the same issue. I saw the same error when I ran flutter build ios.
The error message was displayed red color on my VS code terminal, but it was kind of misleading. I found it was not the main issue.
The actual issue should be on the following error section.
So, please run flutter build ios --verbose and read the output carefully.
In my situation, there were other issues of the failure of flutter build ios. The issues were like forget to put in GoogleService-Info.plist or iOS target version is less than the requirement of flutter packages.