在 iOS 9 SDK 上测试 Google Sign-In 2.1.0 时，调用GIDSignIn.sharedInstance().signInSilently()最终在内部 Google Sign-In SDK 调用时崩溃canOpenURL.
-canOpenURL: failed for URL: "com.googleusercontent.apps.1234567890-abcdefghijklmnopqrstuvwxyz://a" - error: "This app is not allowed to query for scheme com.googleusercontent.apps.1234567890-abcdefghijklmnopqrstuvwxyz"
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Your app must support the following URL schemes: com.example.foo, com.googleusercontent.apps.1234567890-abcdefghijklmnopqrstuvwxyz'
-canOpenURL: failed for URL: "com-google-gidconsent-google://" - error: "This app is not allowed to query for scheme com-google-gidconsent-google"
-canOpenURL: failed for URL: "com-google-gidconsent-youtube://" - error: "This app is not allowed to query for scheme com-google-gidconsent-youtube"
-canOpenURL: failed for URL: "com-google-gidconsent://" - error: "This app is not allowed to query for scheme com-google-gidconsent"
-canOpenURL: failed for URL: "com.google.gppconsent.2.4.1://" - error: "This app is not allowed to query for scheme com.google.gppconsent.2.4.1"
-canOpenURL: failed for URL: "com.google.gppconsent.2.4.0://" - error: "This app is not allowed to query for scheme com.google.gppconsent.2.4.0"
-canOpenURL: failed for URL: "googlechrome:" - error: "This app is not allowed to query for scheme googlechrome"
-canOpenURL: failed for URL: "googlechrome-x-callback:" - error: "This app is not allowed to query for scheme googlechrome-x-callback"
-canOpenURL: failed for URL: "googlechrome-x-callback:" - error: "This app is not allowed to query for scheme googlechrome-x-callback"
-canOpenURL: failed for URL: "googlechrome:" - error: "This app is not allowed to query for scheme googlechrome"
iOS 9 引入了新的变化canOpenURL要求应用程序将其需要查询的所有方案列入白名单。
这篇文章发表于快速了解 iOS 9 URL 方案更改解释了原因。
至少您需要将您自己的应用程序标识符和 Google OAuth 应用程序 ID 列入白名单Info.plist under LSApplicationQueriesSchemes。您还可以将其他方案 Google 登录查询列入白名单，以消除其他警告。
<key>LSApplicationQueriesSchemes</key>
<array>
<string>com.example.foo</string>
<string>com.googleusercontent.apps.1234567890-abcdefghijklmnopqrstuvwxyz</string>
<string>com-google-gidconsent-google</string>
<string>com-google-gidconsent-youtube</string>
<string>com-google-gidconsent</string>
<string>com.google.gppconsent.2.4.1</string>
<string>com.google.gppconsent.2.4.0</string>
<string>googlechrome</string>
<string>googlechrome-x-callback</string>
</array>
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