当我为通用设备构建或为真实设备运行时，它会在 xcode 上出现以下错误
ld: warning: Could not find auto-linked framework 'Flutter' Undefined symbols for architecture armv7: "_FlutterMethodNotImplemented", referenced from:
-[FLTDeviceInfoPlugin handleMethodCall:result:] in DeviceInfoPlugin.o "_OBJC_CLASS_$_FlutterMethodChannel", referenced from:
objc-class-ref in DeviceInfoPlugin.o ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation)
颤振构建命令运行没有错误
颤振医生：
121:flutter_module sumeetjain$ flutter doctor Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, v1.9.1+hotfix.2, on Mac OS X 10.14.6 18G95, locale en-IN) [✗] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/setup/#android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
You may also want to add it to your PATH environment variable.
[✓] Xcode - develop for iOS and macOS (Xcode 10.3) [!] Android Studio (not installed) [✓] Connected device (2 available)
! Doctor found issues in 2 categories.
但是当我将频道更改为母版时，错误并没有出现。 由于我想发布我的应用程序，所以我不能在主频道上这样做！
主通道颤振医生
[✓] Flutter (Channel master, v1.10.3-pre.70, on Mac OS X 10.14.6 18G95, locale en-IN)
[✗] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/setup/#android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
You may also want to add it to your PATH environment variable.
[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
[!] Android Studio (not installed)
[!] Connected device
! No devices available
! Doctor found issues in 3 categories.
这是 Flutter 方面的一个错误。此问题的唯一解决方法是升级您正在使用的 SDK 版本。主服务器上不会出现此问题，修复程序也应推出为稳定版。