小编blu*_*492的帖子

我使用Mac并升级到Android studio“Bumblebee”，只有在Mac中当我尝试执行以下操作时：Build -> Flutter -> Build iOS 它显示此警告：

Warning: CocoaPods not installed. Skipping pod install. CocoaPods is used to retrieve the iOS and macOS platform side\'s plugin code that responds to your plugin usage on the Dart side. Without CocoaPods, plugins will not work on iOS or macOS. For more info, see https://flutter.dev/platform-plugins To install see https://guides.cocoapods.org/using/getting-started.html#installation for instructions. CocoaPods not installed or not in valid state. Process finished with exit code 1

但我已经这么做了\ngem install cocoapods Successfully …

我在 Mac -> Android studio 中使用 Flutter，当我在终端中编写 pod install 时。它告诉我

Analyzing dependencies
[!] No podspec found for `flutter_keyboard_visibility_web` in .symlinks/plugins/flutter_keyboard_visibility_web/ios`

我从一年前开始使用颤振，这是我第一次发生这种情况。我无法运行该应用程序。我在 pubspec 中没有这个名字的插件 flutter_keyboard_visibility_web

怎么解决，谢谢

我的 flutter 应用程序运行良好，但是当我尝试通过存档将应用程序上传到 App Store 时：Xcode -> Product -> Archive
它失败并出现两个错误 flutter_inappwebview 中的第一个错误消息如下：

CompileSwiftSources normal arm64 com.apple.xcode.tools.swift.compiler (in target 'flutter_inappwebview' from project 'Pods')
    cd /Users/user1/StudioProjects/app/ios/Pods
    export DEVELOPER_DIR\=/Applications/Xcode.app/Contents/Developer
    export SDKROOT\=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS15.4.sdk
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -incremental -module-name flutter_inappwebview -O -whole-module-optimization -enforce-exclusivity\=checked @/Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Pods.build/Release-iphoneos/flutter_inappwebview.build/Objects-normal/arm64/flutter_inappwebview.SwiftFileList -D COCOAPODS -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS15.4.sdk -target arm64-apple-ios12.0 -g -module-cache-path /Users/user1/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -embed-bitcode -swift-version 5 -I /Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/BuildProductsPath/Release-iphoneos/flutter_inappwebview -F /Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/BuildProductsPath/Release-iphoneos/flutter_inappwebview -F /Users/user1/flutter/bin/cache/artifacts/engine/ios-release/Flutter.xcframework/ios-arm64_armv7 -F /Users/osamahhaitham/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/BuildProductsPath/Release-iphoneos/OrderedSet -c -num-threads 4 -output-file-map /Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Pods.build/Release-iphoneos/flutter_inappwebview.build/Objects-normal/arm64/flutter_inappwebview-OutputFileMap.json -parseable-output -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Pods.build/Release-iphoneos/flutter_inappwebview.build/Objects-normal/arm64/flutter_inappwebview.swiftmodule -Xcc -I/Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Pods.build/Release-iphoneos/flutter_inappwebview.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Pods.build/Release-iphoneos/flutter_inappwebview.build/flutter_inappwebview-generated-files.hmap -Xcc -I/Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Pods.build/Release-iphoneos/flutter_inappwebview.build/flutter_inappwebview-own-target-headers.hmap -Xcc -I/Users/user1/Library/Developer/Xcode/DerivedData/Runner-dmjvwbvrfekhkvanzgfshfxgayly/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Pods.build/Release-iphoneos/flutter_inappwebview.build/flutter_inappwebview-all-non-framework-target-headers.hmap …

我想获取/计算 dart 中两次之间的小时和分钟。示例：如果 start_time 为 17:30，end_time 为 09:00（后一天），则应返回总计：15 小时 30 分钟

我的代码：

check_two_times_is_before(String start_time, String end_time){
    var format = DateFormat("HH:mm");
    var start = format.parse(start_time);
    var end = format.parse(end_time);

    if(start.isAfter(end)) {
     // do something here
    }
  }