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Запуск lib / main_dev.dart на iPhone Кингмана в режиме отладки… Автоматическое подписание iOS для развертывания устройства с использованием указанной команды разработчиков в проекте Xcode: FK3FA23S5A запускает сборку Xcode… Сбой сборки Xcode из-за одновременных сборок, повторите попытку через 2 секунды. Сборка Xcode завершена. 134.1с Не удалось собрать вывод ошибки приложения iOS из сборки Xcode:

 ↳
    ** BUILD FAILED **


Xcode's output:
↳
    /Users/kingman/Documents/development/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.6.7 12/ios/Classes/FLTImagePickerPlugin.m:149:20: warning: 'UIAlertView' is deprecated: first deprecated in iOS 9.0 - UIAlertView is deprecated. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead [-Wdeprecated-declarations]
        [[[UIAlertView alloc] initWithTitle:@"Error"
                       ^
    In module 'UIKit' imported from /Users/kingman/Desktop/HLH/projects/ios/Pods/Target Support Files/image_picker/image_picker-prefix.pch:2:
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIAlertView.h:27:12: note: 'UIAlertView' has been explicitly marked deprecated here
    @interface UIAlertView : UIView
               ^
    1 warning generated.
    /Users/kingman/Documents/development/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.2.1/ios/Classes/QRView.swift:66:13: warning: 'UIAlertView' was deprecated in iOS 9.0: UIAlertView is deprecated. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead
                UIAlertView(title: "Scanning Unavailable", message: "This app does not have permission to access the camera", delegate: nil, cancelButtonTitle: nil, otherButtonTitles: "Ok").show()
                ^
    /Users/kingman/Desktop/HLH/projects/ios/Pods/FirebaseMessaging/FirebaseMessaging/Sources/FIRMessagingPubSub.m:283:12: warning: parameter 'expression' not found in the function declaration [-Wdocumentation]
     *  @param expression The topic expression used to generate a pubsub topic
               ^~~~~~~~~~
    /Users/kingman/Desktop/HLH/projects/ios/Pods/FirebaseMessaging/FirebaseMessaging/Sources/FIRMessagingPubSub.m:283:12: note: did you mean 'topic'?
     *  @param expression The topic expression used to generate a pubsub topic
               ^~~~~~~~~~
               topic
    1 warning generated.
    /Users/kingman/Desktop/HLH/projects/ios/Pods/gRPC-C  /src/cpp/server/async_generic_service.cc:19:10: fatal error: 'grpcpp/generic/async_generic_service.h' file not found
    #include <grpcpp/generic/async_generic_service.h>
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/kingman/Desktop/HLH/projects/ios/Pods/gRPC-C  /src/cpp/server/async_generic_service.cc:19:10: note: did not find header 'generic/async_generic_service.h' in framework 'grpcpp' (loaded from '/Users/kingman/Desktop/HLH/projects/build/ios/Debug-dev-iphoneos/gRPC-C  ')
    1 error generated.
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Using build description from disk

Could not build the precompiled application for the device.

Error launching application on Kingman’s iPhone.
 

Запуск flutter clean обычно решает проблему для меня. Другой метод, который вы можете попробовать, — сгенерировать новую сборку ios. Вы можете удалить /ios папку в своем проекте Flutter и создать новую, используя flutter create --platforms=ios [PROJECT]