Xcode 15 UIKit Preview FailedToLaunchAppError：无法启动错误

Question

我尝试在 Xcode 15 中使用 #Preview 宏预览 UIKit 视图，但出现此错误

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== PREVIEW UPDATE ERROR:\n\n    FailedToLaunchAppError: Failed to launch\n    \n    ==================================\n    \n    |  RemoteHumanReadableError: The operation couldn\xe2\x80\x99t be completed. Transaction failed. Process failed to launch. (process launch failed)\n    |  \n    |  BSTransactionError (1):\n    |  ==error-reason: process launch failed\n    |  ==transaction: <FBApplicationProcessLaunchTransaction: 0x600003b287e0>\n    |  ==precipitating-error: Error Domain=FBProcessExit Code=64 "The process failed to launch." UserInfo={NSLocalizedFailureReason=The process failed to launch., BSErrorCodeDescription=launch-failed, NSUnderlyingError=0x600000c1ad90 {Error Domain=RBSRequestErrorDomain Code=5 "Launch failed." UserInfo={NSLocalizedFailureReason=Launch failed., NSUnderlyingError=0x600000c1aee0 {Error Domain=NSPOSIXErrorDomain Code=111 "Unknown error: 111" UserInfo={NSLocalizedDescription=Launchd job spawn failed}}}}}\n    |  ==error-description: Process failed to launch.\n    |  ==NSLocalizedFailureReason: Transaction failed. Process failed to launch. (process launch failed)\n

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我尝试在 iPhone 15 上预览的代码

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import UIKit\n\nfinal class SomeViewController: UIViewController {\n    override func viewDidLoad() {\n        super.viewDidLoad()\n        view.backgroundColor = .red\n    }\n}\n\n@available(iOS 17, *)\n#Preview {\n    SomeViewController()\n}\n

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Answer 1

我们的项目最初无法使用Apple Silicon中的模拟器进行调试，因此无法预览。

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从每个目标中排除 arm64 架构后：\n\n模拟器可以工作，但是#Preview仍然无法工作，并给出与您的问题相同的错误消息：无法启动（我很确定我们得到了完全相同的错误）。

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尝试了各种方法后：

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• 删除didFinishLaunch中的所有代码
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• 删除预览缓存
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• 删除模拟器缓存
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• 删除派生数据
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• 重新启动 Xcode
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• 重新启动Mac
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全部失败\xef\xbc\x8c直到我们记住如何使用 Rosetta 模拟器构建应用程序：\n

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使用Rosetta模拟器作为构建目标并将预览设置为同一设备，奇迹发生了\xef\xbc\x9a\n

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对我们来说，重要的是：\n我们关闭了自动刷新画布以使预览最终正常工作。\n

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