本頁面提供提示和疑難排解資訊，協助您解決使用 Firebase 時可能遇到的 Apple 平台專屬問題。
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疑難排解與疑難排解；Apple 平台和 Firebase 常見問題
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上次更新時間：2025-08-29 (世界標準時間)。
[null,null,["上次更新時間：2025-08-29 (世界標準時間)。"],[],[],null,["\u003cbr /\u003e\n\nThis page offers tips and troubleshooting for Apple platform-specific issues\nthat you might encounter when using Firebase.\n\nHave other challenges or don't see your issue outlined below? Make sure to check\nout the [main Firebase FAQ](/support/faq) for more pan-Firebase or\nproduct-specific FAQ.\n\nYou can also check out the\n[Firebase Apple platforms SDK GitHub repo](https://github.com/firebase/firebase-ios-sdk/issues)\nfor an up-to-date list of reported issues and troubleshooting. We encourage you\nto file your own Firebase Apple platforms SDK related issues there, too! \n\nWhat versions of Xcode does Firebase support?\n\nFirebase supports up to two major versions of Xcode, not including versions\nof Xcode that Apple no longer supports. For example, starting in March 2019,\nApple required at least iOS 12 on all apps, meaning Xcode 9 support was\ndropped and Xcode 10 was the only major version supported.\n\nChanges to support for specific minor or patch versions of Xcode\n(for example, 9.2.0 to 9.4.1) are determined based on the needs of the\nFirebase Apple platforms SDK and a survey of developer usage. These changes\nare reflected in the\n[Firebase Apple platforms SDK release notes](/support/release-notes/ios)\nand on the [Firebase Apple platforms SDK setup page](/docs/ios/setup).\n\nTo see the minimum Xcode version supported by the SDK, check\nthe requirements listed in\n[Add Firebase to your Apple project](/docs/ios/setup).\n\nFirebase support for Beta releases of Xcode is available on a \"best effort\"\nbasis. Developers can track and submit issues in the\n[Firebase Apple platforms SDK repository on GitHub](//github.com/firebase/firebase-ios-sdk/issues). \n\nMy app prompts the user for their password to access Keychain items on macOS. How do I fix this?\n\nUpgrade your Firebase dependency to version 9.6.0 or higher and add the\n\\[Keychain Sharing capability\\](/docs/ios/troubleshooting-faq#macos-keychain-sharing)\nto your target. \n\nWhy does Firebase require the Keychain Sharing capability on macOS?\n\nFirebase SDKs use keychain to store information like the Firebase\ninstallation ID used for FCM. Without Keychain access, Firebase SDKs may not\nfunction correctly. The macOS keychain behaves differently than the iOS-style\nkeychain that is used on other platforms (iOS, tvOS, macCatalyst,\nand watchOS).\n\nOn macOS, apps use a shared keychain that may be modified by other apps and\nprocesses. Unlike iOS, there is no sandboxed keychain that the app has\nimplicit access to. So, when a Mac app interacts with the keychain, the system\nprompts the user for access since the Mac app may be modifying a keychain item\nthat it did not create. To address this discrepancy, Firebase queries the\nkeychain with the `kSecUseDataProtectionKeychain` key, which tells\nthe app to query a keychain item that is part of a keychain access group\n(this is default behavior on other platforms). The Keychain Sharing capability\nis required because the app needs it to synthesize an access group that can be\nshared amongst its targets, thus giving permission for the app to freely\naccess keychain items in the access group.\n\nFor more information, see Apple's\n[Keychain documentation](https://developer.apple.com/documentation/security/keychain_services/keychains). \n\nIn Xcode versions 13 and later, why can my UIKit apps not open some\nURLs I've registered\nin my Info.plist?\n\nApple introduced a limit of 50 `LSApplicationQueriesSchemes`\nentries in `Info.plist` files. In 2015, Apple introduced\n`LSApplicationQueriesSchemes` to limit the number of URL queries\neach app could make. With the release of Xcode 13, these limits are enforced,\nwhile in Xcode 12 and earlier there was no effective limit to the number of\nschemes.\n\nSome Firebase products, like Firebase Authentication and Firebase Dynamic Links,\nrequire the use of custom URL schemes to redirect to your application. These\nURLs conform to a concise and consistent URL scheme that should not count\nsignificantly against the 50 link scheme limit.\n\nNote that for apps that continue to register more than 50\n`LSApplicationQueriesSchemes`, some schemes will\nbe silently ignored. The app may be unable to execute certain deeplinks,\ndepending on the order in which they are added."]]