Flutter iOS 构建失败并在 iosRunnerAppDelegate.swift 中出现多个错误

我开发了一款Ffltter 2.10.5应用程序，在Android上运行得很好.我现在正try 用代码转换设备为iOS构建它，但我得到了一些错误:

/Users/builder/clone/ios/Runner/AppDelegate.swift:11:9: error: expected expression in list of expressions
        if (@available(iOS 10.0, *)) {
            ^
    /Users/builder/clone/ios/Runner/AppDelegate.swift:12:31: error: expected ',' separator
        [UNUserNotificationCenter currentNotificationCenter].delegate = (id<UNUserNotificationCenterDelegate>) self;
                                  ^
                                 ,
    /Users/builder/clone/ios/Runner/AppDelegate.swift:11:8: error: cannot convert value of type '()' to expected condition type 'Bool'
        if (@available(iOS 10.0, *)) {
           ^~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/builder/clone/ios/Runner/AppDelegate.swift:12:31: error: cannot find 'currentNotificationCenter' in scope
        [UNUserNotificationCenter currentNotificationCenter].delegate = (id<UNUserNotificationCenterDelegate>) self;
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~

我没有找到太多关于这些问题的信息.这是Ffltter生成的快速代码的问题吗？在这种情况下，我几乎不能做什么来解决它.