我正在使用颤振，除了今天，一切都运行良好。现在，每当我尝试登录时，都会收到此错误消息：我的 iOS 模拟器上的 FIREBASE 发生网络错误（例如超时、连接中断或无法访问的主机）。
这是我的控制台中抛出的错误：
Challenge SecTrustResultType 5 for www.googleapis.com, properties: (
{
type = error;
value = "Root certificate is not trusted.";
}
)
Cancelling authentication challenge for https://www.googleapis.com/identitytoolkit/v3/relyingparty/verifyPassword?key=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
"LocalDataTask <59EA3048-54FD-41F4-87FF-4919A55A9E06>.<1>"
), _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <59EA3048-54FD-41F4-87FF-4919A55A9E06>.<1>, NSLocalizedDescription=cancelled} [-999]
我已经尝试了一切，用谷歌搜索了一切，但这很奇怪。由于代码以前可以工作，但不能在我的系统上工作。我想我的模拟器有一些问题。检查了我的模拟器的日期，没问题。
这是我的登录代码：
final AuthCredential credential = EmailAuthProvider.getCredential(email: this.email.text, password: this.password.text);
this._auth.signInWithCredential(credential).then((user) async {
this.gotoHome(context);
}, onError: (e){
Helpers.showError(context, (e as PlatformException).message);
});
颤振医生报告：
[✓] Flutter (Channel master, v1.5.9-pre.194, on Mac OS X 10.14.5 18F132, locale en-US)
• Flutter version 1.5.9-pre.194 at /Users/alok/flutter
• Framework revision 3436e165c8 (6 weeks ago), 2019-05-09 10:37:34 -0700
• Engine revision 644db5a49c
• Dart version 2.3.1 (build 2.3.1-dev.0.0 a0290f823c)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/alok/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /Applications/Android
Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)
• All Android licenses accepted.
[✓] iOS toolchain - develop for iOS devices (Xcode 10.0)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.0, Build version 10A255
• ios-deploy 1.9.4
• CocoaPods version 1.6.0
[!] Android Studio (version 3.4)
• Android Studio at /Applications/Android Studio.app/Contents
✗ Flutter plugin not installed; this adds Flutter specific functionality.
Aloks-MacBook-Air:newmonkapp alok$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v1.5.9-pre.194, on Mac OS X 10.14.5 18F132, locale en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.0)
[!] Android Studio (version 3.4)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] Connected device (1 available)
! Doctor found issues in 1 category.
还遇到了上述错误中包含的此错误：
遇到网络错误。代码，错误：-999，错误域=NSURLErrorDomain 代码=-999 “取消” UserInfo={NSErrorFailingURLStringKey= https://play.googleapis.com/log , NSErrorFailingURLKey= https://play.googleapis.com/log , _NSURLErrorRelatedURLSessionTaskErrorKey =( "LocalUploadTask .<1>" ), _NSURLErrorFailingURLSessionTaskErrorKey=LocalUploadTask .<1>, NSLocalizedDescription=cancelled} 5.16.0 - [GULNetwork][I-NET901017] 遇到网络错误。代码，错误：-999，错误域=NSURLErrorDomain 代码=-999 “取消” UserInfo={NSErrorFailingURLStringKey= https://play.googleapis.com/log , NSErrorFailingURLKey= https://play.googleapis.com/log, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalUploadTask .<1>" ), _NSURLErrorFailingURLSessionTaskErrorKey=LocalUploadTask .<1>, NSLocalizedDescription=cancelled} 5.16.0 - [Firebase/Core][I-COR000020] 发布到 Clearcut 时出错：错误域 = NSURLErrorDomain 代码 = -999 “取消” UserInfo={NSErrorFailingURLStringKey= https://play.googleapis.com/log , NSErrorFailingURLKey= https://play.googleapis.com/log , _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalUploadTask .<1>" ), _NSURLErrorFailingURLSessionTaskErrorKey= LocalUploadTask .<1>，NSLocalizedDescription=cancelled}，状态码：0