我遵循这个指南:
https://www.mongodb.com/docs/realm/sdk/react-native/bootstrap-with-expo/
但是当我到达说要运行expo run:ios的步骤时，它失败了，出现以下错误:
› Skipping dev server
› Planning build
› Executing react-native Pods/FBReactNativeSpec » [CP-User] Generate Specs
❌ (node_modules/expo-modules-core/ios/Swift/Functions/AsyncFunctionComponent.swift:94:17)
92 | }
93 |
> 94 | let queue = queue ?? defaultQueue
| ^ variable used within its own initial value
95 |
96 | queue.async { [body, name] in
97 | let returnedValue: ReturnType?
❌ (node_modules/expo-modules-core/ios/Swift/Views/ConcreteViewProp.swift:42:52)
40 | }
41 | guard let value = try propType.cast(value) as? PropType else {
> 42 | throw Conversions.CastingException<PropType>(value)
| ^ variable declared in 'guard' condition is not usable in its body
43 | }
44 | setter(view, value)
45 | }
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:8:33)
6 | */
7 | public final class ConcurrentFunctionDefinition<Args, FirstArgType, ReturnType>: AnyFunction {
> 8 | typealias ClosureType = (Args) async throws -> ReturnType
| ^ consecutive declarations on a line must be separated by ';'
9 |
10 | let body: ClosureType
11 |
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:8:34)
6 | */
7 | public final class ConcurrentFunctionDefinition<Args, FirstArgType, ReturnType>: AnyFunction {
> 8 | typealias ClosureType = (Args) async throws -> ReturnType
| ^ expected declaration
9 |
10 | let body: ClosureType
11 |
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:56:36)
54 | // swiftlint:disable force_cast
55 | let argumentsTuple = try Conversions.toTuple(arguments) as! Args
> 56 | let returnValue = try await body(argumentsTuple)
| ^ consecutive statements on a line must be separated by ';'
57 |
58 | result = .success(returnValue)
59 | } catch let error as Exception {
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:94:49)
92 | public func AsyncFunction<R>(
93 | _ name: String,
> 94 | @_implicitSelfCapture _ closure: @escaping () async throws -> R
| ^ expected ',' separator
95 | ) -> ConcurrentFunctionDefinition<(), Void, R> {
96 | return ConcurrentFunctionDefinition(
97 | name,
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:94:62)
92 | public func AsyncFunction<R>(
93 | _ name: String,
> 94 | @_implicitSelfCapture _ closure: @escaping () async throws -> R
| ^ expected ':' following argument label and parameter name
95 | ) -> ConcurrentFunctionDefinition<(), Void, R> {
96 | return ConcurrentFunctionDefinition(
97 | name,
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:109:51)
107 | public func AsyncFunction<R, A0: AnyArgument>(
108 | _ name: String,
> 109 | @_implicitSelfCapture _ closure: @escaping (A0) async throws -> R
| ^ expected ',' separator
110 | ) -> ConcurrentFunctionDefinition<(A0), A0, R> {
111 | return ConcurrentFunctionDefinition(
112 | name,
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:109:64)
107 | public func AsyncFunction<R, A0: AnyArgument>(
108 | _ name: String,
> 109 | @_implicitSelfCapture _ closure: @escaping (A0) async throws -> R
| ^ expected ':' following argument label and parameter name
110 | ) -> ConcurrentFunctionDefinition<(A0), A0, R> {
111 | return ConcurrentFunctionDefinition(
112 | name,
❌ (node_modules/expo-modules-core/ios/Swift/Functions/ConcurrentFunctionDefinition.swift:124:55)
122 | public func AsyncFunction<R, A0: AnyArgument, A1: AnyArgument>(
123 | _ name: String,
> 124 | @_implicitSelfCapture _ closure: @escaping (A0, A1) async throws -> R
| ^ expected ',' separator
125 | ) -> ConcurrentFunctionDefinition<(A0, A1), A0, R> {
126 | return ConcurrentFunctionDefinition(
127 | name,
... Hundreds of similar errors later...
❌ (node_modules/expo-modules-core/ios/Swift/Views/ViewDefinition.swift:68:3)
66 | public func View<ViewType: UIView>(
67 | _ viewType: ViewType.Type,
> 68 | @ViewDefinition<ViewType>.ElementsBuilder _ elements: @escaping () -> [AnyDefinition]
| ^ struct 'ElementsBuilder' cannot be used as an attribute
69 | ) -> ViewDefinition<ViewType> {
70 | return ViewDefinition(viewType, elements: elements())
71 | }
❌ (node_modules/expo-modules-core/ios/Swift/Views/ViewManagerDefinitionComponents.swift:19:3)
17 | public func Prop<ViewType: UIView, PropType: AnyArgument>(
18 | _ name: String,
> 19 | @_implicitSelfCapture _ setter: @escaping (ViewType, PropType) -> Void
| ^ unknown attribute '_implicitSelfCapture'
20 | ) -> ConcreteViewProp<ViewType, PropType> {
21 | return ConcreteViewProp(
22 | name: name,
❌ (node_modules/expo-modules-core/ios/Swift/Views/ViewManagerDefinitionComponents.swift:34:3)
32 | */
33 | public func OnViewDidUpdateProps<ViewType: UIView>(
> 34 | @_implicitSelfCapture _ closure: @escaping (_ view: ViewType) -> Void
| ^ unknown attribute '_implicitSelfCapture'
35 | ) -> ViewLifecycleMethod<ViewType> {
36 | return ViewLifecycleMethod(type: .didUpdateProps, closure: closure)
37 | }
› Compiling react-native Pods/React-RCTVibration » RCTVibrationPlugins.mm
› Compiling react-native Pods/React-RCTVibration » RCTVibration.mm
› Compiling react-native Pods/React-RCTVibration » React-RCTVibration-dummy.m
› Compiling react-native Pods/React-RCTSettings » RCTSettingsManager.mm
› Compiling react-native Pods/React-RCTSettings » React-RCTSettings-dummy.m
› Compiling react-native Pods/React-RCTSettings » RCTSettingsPlugins.mm
› Compiling react-native Pods/React-RCTNetwork » React-RCTNetwork-dummy.m
› 104 error(s), and 0 warning(s)
我不知道我做错了什么Xcode说下面的语句
CommandError: Failed to build iOS project. "xcodebuild" exited with error code 65.
我已经安装了最新的expo cli
我尝试直接在Xcode中构建项目，项目确实构建了，但它不会在模拟器上启动，博览会打开，但当连接到开发服务器时，应用程序只是崩溃。
我不明白为什么运行expo run:ios会导致构建失败，而在Xcode中构建会导致"成功"。
这个解决方案其实有点傻，
所以我能够在Xcode中成功构建而不是使用expo run:ios成功构建的原因是因为我在这台机器上安装了两个版本的Xcode。一个版本是Xcode 12.3,xcrun指向那个sdk包。我能够通过运行sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer来修复这个问题，双重检查xcrun --show-sdk-path现在应该列出适当的路径。另外，我还删除了pods文件和pod。并使用expo run:ios