ios - 如何在 flutter 中降级包？

Question

cloud_firestore 0.12.11 在 flutter 中不适合我，它不允许我的应用程序在调试中启动。我将如何降级这个包？在 pubspec 文件中，我使用了较低版本的 cloud_firestore 即。 (cloud_firestore: ^0.12.9+4) 然后保存，VS Code 得到了包但是当我尝试再次启动时它给出了同样的错误:

                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/kev/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore- 
    0.12.11/ios/Classes/CloudFirestorePlugin.m:157:24: error: no visible @interface for 
    'FIRQuery' declares the selector 'queryWhereFieldPath:arrayContainsAny:'
                query = [query queryWhereFieldPath:fieldPath arrayContainsAny:value];
                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/kev/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore- 
   0.12.11/ios/Classes/CloudFirestorePlugin.m:163:24: error: no visible @interface for 
   'FIRQuery' declares the selector 'queryWhereField:in:'
            query = [query queryWhereField:fieldName in:value];
                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/kev/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore- 
   0.12.11/ios/Classes/CloudFirestorePlugin.m:165:24: error: no visible @interface for 
  'FIRQuery' declares the selector 'queryWhereFieldPath:in:'
                query = [query queryWhereFieldPath:fieldPath in:value];
                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/kev/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore- 
   0.12.11/ios/Classes/CloudFirestorePlugin.m:764:16: warning: 'timestampsInSnapshotsEnabled' 
    is deprecated [-Wdeprecated-declarations]
              settings.timestampsInSnapshotsEnabled = 
    (bool)call.arguments[@"timestampsInSnapshotsEnabled"];
                   ^
    In module 'FirebaseFirestore' imported from 

  /Users/kev/Documents/flutterprojects/shopapp/ios/Pods/Headers/Public/Firebase/Firebase.h:45:

 /Users/kev/Documents/flutterprojects/shopapp/ios/Pods/FirebaseFirestore/Firestore/Source/Public .   /FIRFirestoreSettings.h:69:20: note: 'timestampsInSnapshotsEnabled' has been explicitly marked 
    deprecated here
           __attribute__((deprecated));
                       ^
       1 warning and 4 errors generated.
       note: Using new build systemnote: Planning buildnote: Constructing build description
   Could not build the application for the simulator.
   Error launching application on iPhone X.

当我检查 .pubcache 中的 flutter SDK -> 托管 -> pub.dartlang.org -> 那里有一个文件夹 cloud_firestore 0.12.11 我该如何解决这个问题？当我使用在 pubspec 文件中注释掉的 cloud_firestore 启动时，我的应用程序开始正常运行。

Answer 1

cloud_firestore: ^0.12.9+4

这个名为 caret 的小标志 ^ 用于告诉 pub 获取此 版本或更高。要选择特定版本，您需要将其删除。

cloud_firestore: 0.12.9+4

要了解有关依赖项的更多信息，请访问关于 caret syntax 的 Dart 文档和 version constraints .