我刚刚将 firebase_core 导入到您打开一个新的颤振项目时获得的普通应用程序中，并且该应用程序启动正常。接下来，我将 firebase_messaging 添加到 pubspec.yaml 中，这导致应用程序无法启动并产生错误。任何帮助是极大的赞赏。这是产生的错误：
Failed to build iOS app
Error output from Xcode build:
↳
** BUILD FAILED **
Xcode's output:
↳
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:114:43: error: expected a
type
- (void)applicationReceivedRemoteMessage:(FIRMessagingRemoteMessage
*)remoteMessage {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:180:42: warning:
'UIUserNotificationSettings' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNNotificationSettings [-Wdeprecated-declarations]
didRegisterUserNotificationSettings:(UIUserNotificationSettings
*)notificationSettings {
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:44:12: note: 'UIUserNotificationSettings' has been
explicitly marked deprecated here
@interface UIUserNotificationSettings : NSObject
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:190:53: error: nullability
specifier 'nonnull' conflicts with existing specifier 'nullable'
didReceiveRegistrationToken:(nonnull NSString *)fcmToken {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:49:5: warning:
'UIUserNotificationType' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNAuthorizationOptions [-Wdeprecated-declarations]
UIUserNotificationType notificationTypes = 0;
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:17:32: note: 'UIUserNotificationType' has been
explicitly marked deprecated here
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:52:28: warning:
'UIUserNotificationTypeSound' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNAuthorizationOptions [-Wdeprecated-declarations]
notificationTypes |= UIUserNotificationTypeSound;
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:17:32: note: 'UIUserNotificationType' has been
explicitly marked deprecated here
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:55:28: warning:
'UIUserNotificationTypeAlert' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNAuthorizationOptions [-Wdeprecated-declarations]
notificationTypes |= UIUserNotificationTypeAlert;
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:17:32: note: 'UIUserNotificationType' has been
explicitly marked deprecated here
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:58:28: warning:
'UIUserNotificationTypeBadge' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNAuthorizationOptions [-Wdeprecated-declarations]
notificationTypes |= UIUserNotificationTypeBadge;
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:17:32: note: 'UIUserNotificationType' has been
explicitly marked deprecated here
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:60:5: warning:
'UIUserNotificationSettings' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNNotificationSettings [-Wdeprecated-declarations]
UIUserNotificationSettings *settings =
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:44:12: note: 'UIUserNotificationSettings' has been
explicitly marked deprecated here
@interface UIUserNotificationSettings : NSObject
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:61:37: warning:
'UIUserNotificationSettings' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNNotificationSettings [-Wdeprecated-declarations]
[UIUserNotificationSettings settingsForTypes:notificationTypes
categories:nil];
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:44:12: note: 'UIUserNotificationSettings' has been
explicitly marked deprecated here
@interface UIUserNotificationSettings : NSObject
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:62:40: warning:
'registerUserNotificationSettings:' is deprecated: first deprecated in iOS 10.0 -
Use UserNotifications Framework's -[UNUserNotificationCenter
requestAuthorizationWithOptions:completionHandler:] and -[UNUserNotificationCenter
setNotificationCategories:] [-Wdeprecated-declarations]
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIApplication.h:250:1: note: 'registerUserNotificationSettings:' has been
explicitly marked deprecated here
- (void)registerUserNotificationSettings:(UIUserNotificationSettings
*)notificationSettings API_DEPRECATED("Use UserNotifications Framework's
-[UNUserNotificationCenter requestAuthorizationWithOptions:completionHandler:] and
-[UNUserNotificationCenter setNotificationCategories:]", ios(8.0, 10.0))
API_UNAVAILABLE(tvos);
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:80:7: error: use of
undeclared identifier 'FIRInstanceID'
[[FIRInstanceID instanceID]
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:91:7: error: use of
undeclared identifier 'FIRInstanceID'
[[FIRInstanceID instanceID] deleteIDWithHandler:^void(NSError *_Nullable
error) {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:115:52: error: property
'appData' not found on object of type '__strong id'
[self didReceiveRemoteNotification:remoteMessage.appData];
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:179:1: warning: implementing
deprecated method [-Wdeprecated-implementations]
- (void)application:(UIApplication *)application
^
In module 'Flutter' imported from
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.h:5:
/Users/alfieanil/Developer/flutter/bin/cache/artifacts/engine/ios/Flutter.xcframew
ork/ios-arm64_x86_64-simulator/Flutter.framework/Headers/FlutterPlugin.h:74:1:
note: method 'application:didRegisterUserNotificationSettings:' declared here
- (void)application:(UIApplication*)application
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:182:70: warning:
'UIUserNotificationTypeSound' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNAuthorizationOptions [-Wdeprecated-declarations]
@"sound" : [NSNumber numberWithBool:notificationSettings.types &
UIUserNotificationTypeSound],
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:17:32: note: 'UIUserNotificationType' has been
explicitly marked deprecated here
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:183:70: warning:
'UIUserNotificationTypeBadge' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNAuthorizationOptions [-Wdeprecated-declarations]
@"badge" : [NSNumber numberWithBool:notificationSettings.types &
UIUserNotificationTypeBadge],
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:17:32: note: 'UIUserNotificationType' has been
explicitly marked deprecated here
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
^
/Users/alfieanil/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mes
saging-4.0.0+4/ios/Classes/FirebaseMessagingPlugin.m:184:70: warning:
'UIUserNotificationTypeAlert' is deprecated: first deprecated in iOS 10.0 - Use
UserNotifications Framework's UNAuthorizationOptions [-Wdeprecated-declarations]
@"alert" : [NSNumber numberWithBool:notificationSettings.types &
UIUserNotificationTypeAlert],
^
In module 'UIKit' imported from /Users/alfieanil/Documents/Church
App/App/SwiftTest/another/RELEASES/Primary
Release/IOS/redo_backup/redo_ios/ios/Pods/Target Support
Files/firebase_messaging/firebase_messaging-prefix.pch:2:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Deve
loper/SDKs/iPhoneSimulator14.3.sdk/System/Library/Frameworks/UIKit.framework/Heade
rs/UIUserNotificationSettings.h:17:32: note: 'UIUserNotificationType' has been
explicitly marked deprecated here
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
^
12 warnings and 5 errors generated.
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description
Could not build the application for the simulator.
Error launching application on iPhone 11.