小编Sai*_*lak的帖子

我的Firestore数据库：

我想检查仅在文档“D9GeGdTxarFruuuQklEO”中是否存在名为“EmailOf@Follower.com”的字段，而不是检查所有文档，无论如何要在firestore Flutter 中执行此操作？

未知原因的应用程序按下iOS的Facebook登录按钮时崩溃，但由于未知原因，它在android上运行良好，如果有人遇到此问题，请告诉您如何解决它

这是错误

*** First throw call stack:
(
    0   CoreFoundation                      0x000000010ad5229b __exceptionPreprocess + 331
    1   libobjc.A.dylib                     0x000000010a2ee735 objc_exception_throw + 48
    2   FBSDKCoreKit                        0x0000000107cee01e +[FBSDKInternalUtility validateURLSchemes] + 398
    3   FBSDKLoginKit                       0x0000000107df490e -[FBSDKLoginManager logInParametersWithPermissions:serverConfiguration:] + 110
    4   FBSDKLoginKit                       0x0000000107df53d7 -[FBSDKLoginManager logInWithBehavior:] + 103
    5   FBSDKLoginKit                       0x0000000107df5157 -[FBSDKLoginManager logInWithPermissions:handler:] + 391
    6   FBSDKLoginKit                       0x0000000107df2deb -[FBSDKLoginManager logInWithReadPermissions:fromViewController:handler:] + 395
    7   flutter_facebook_login <…>
Lost connection to device.`

信息清单

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
        <key>CFBundleDevelopmentRegion</key>
        <string>en</string>
        <key>CFBundleExecutable</key>
        <string>$(EXECUTABLE_NAME)</string> …