小编Har*_*hra的帖子

我正在尝试解决 Leet Code 挑战14. 最长的常见前缀：

编写一个函数来查找字符串数组中最长的公共前缀字符串。

如果没有公共前缀，则返回空字符串""。

示例1：

Input: strs = ["flower", "flow", "flight"]
Output: "fl"

Run Code Online (Sandbox Code Playgroud)

示例2：

Input: strs = ["dog", "racecar", "car"]
Output: ""

Run Code Online (Sandbox Code Playgroud)

说明：输入字符串之间没有公共前缀。

限制条件：

• 1 <= strs.length <= 200
• 0 <= strs[i].length <= 200
• strs[i]仅由小写英文字母组成。

我的解决方案：

Input: strs = ["flower", "flow", "flight"]
Output: "fl"

输出：f

如何迭代每个字符并检查它是否相同，然后继续下一个，如果失败则返回最长的公共前缀？

当我尝试在 ios 模拟器上运行我的 React Native 应用程序时，我收到此错误。

错误：

duplicate symbol '_EXCanAskAgain' in:
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/EXPermissions/libEXPermissions.a(EXPermissions.o)
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/XCFrameworkIntermediates/UMReactNativeAdapter/UMReactNativeAdapter.framework/UMReactNativeAdapter(EXPermissionsService.o)
duplicate symbol '_EXExpiresKey' in:
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/EXPermissions/libEXPermissions.a(EXPermissions.o)
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/XCFrameworkIntermediates/UMReactNativeAdapter/UMReactNativeAdapter.framework/UMReactNativeAdapter(EXPermissionsService.o)
duplicate symbol '_EXGrantedKey' in:
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/EXPermissions/libEXPermissions.a(EXPermissions.o)
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/XCFrameworkIntermediates/UMReactNativeAdapter/UMReactNativeAdapter.framework/UMReactNativeAdapter(EXPermissionsService.o)
duplicate symbol '_EXPermissionExpiresNever' in:
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/EXPermissions/libEXPermissions.a(EXPermissions.o)
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/XCFrameworkIntermediates/UMReactNativeAdapter/UMReactNativeAdapter.framework/UMReactNativeAdapter(EXPermissionsService.o)
duplicate symbol '_EXStatusKey' in:
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/EXPermissions/libEXPermissions.a(EXPermissions.o)
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/XCFrameworkIntermediates/UMReactNativeAdapter/UMReactNativeAdapter.framework/UMReactNativeAdapter(EXPermissionsService.o)
duplicate symbol '_OBJC_CLASS_$_EXReactNativeUserNotificationCenterProxy' in:
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/EXPermissions/libEXPermissions.a(EXReactNativeUserNotificationCenterProxy.o)
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/XCFrameworkIntermediates/UMReactNativeAdapter/UMReactNativeAdapter.framework/UMReactNativeAdapter(EXReactNativeUserNotificationCenterProxy.o)
duplicate symbol '_OBJC_METACLASS_$_EXReactNativeUserNotificationCenterProxy' in:
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/EXPermissions/libEXPermissions.a(EXReactNativeUserNotificationCenterProxy.o)
    /Users/harshmishra/Library/Developer/Xcode/DerivedData/myways-gkjarpvjrufpitdstvqcnasxhmrs/Build/Products/Debug-iphonesimulator/XCFrameworkIntermediates/UMReactNativeAdapter/UMReactNativeAdapter.framework/UMReactNativeAdapter(EXReactNativeUserNotificationCenterProxy.o)
ld: 7 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我尝试清理构建文件夹，再次运行 pod install 但没有任何效果。我陷入了这个错误。我无法找到导致此错误的原因。另外，我检查了 myApp > Libraries 文件夹，没有任何内容（空文件夹）。

13.3.1将 Xcode 更新为React Native后出现错误。升级之前Xcode应用程序运行良好。另外，我没有更改任何代码。但我仍然收到错误。我不知道为什么更新后我收到此错误。

Error: Undefined symbol: _swift_stdlib_isStackAllocationSafe


Undefined symbols for architecture arm64:
  "_swift_stdlib_isStackAllocationSafe", referenced from:
      function signature specialization <Arg[1] = Owned To Guaranteed> of generic specialization <Swift.String, Swift._NativeSet<Swift.String>> of Swift._NativeSet.genericIntersection<A where A == A1.Element, A1: Swift.Sequence>(A1) -> Swift._NativeSet<A> in libLaunchDarkly.a(FlagChangeNotifier.o)
      function signature specialization <Arg[1] = Owned To Guaranteed> of generic specialization <Swift.String> of Swift._NativeSet.intersection(Swift._NativeSet<A>) -> Swift._NativeSet<A> in libLaunchDarkly.a(FlagChangeNotifier.o)
      function signature specialization <Arg[1] = Owned To Guaranteed, Arg[2] = Owned To Guaranteed> of function signature specialization <Arg[0] …

我正在尝试循环访问通过调用 API 获取的对象，但是在将数据设置为状态setNodesData并从中获取数据nodesData之后，但是当我尝试这样做时，我收到一条错误消息： TypeError: Object.entries requires that input parameter not be null or undefined in React Native

我也尝试过for(const i in nodesData)，但仍然收到错误消息expression expected

useEffect(() => {
    if (apiHeaders) {
      axios
        .get(
          "https://test-myways-anfhsya-asq.myways.in/api/****",
          {
            headers: apiHeaders,
          }
        )
        .then((res) => {
          console.log("API Call")
          console.log(res?.data);
          setNodesData(res?.data);
        })
        .catch((err)=>{console.log("error:",err)});
    }
  }, [apiHeaders]);

  return (
    
  
      {
      Object?.entries(nodesData).forEach((i) => (
        <View style={{ padding: 5 }}>
          <View
            style={{
              flexDirection: "row",
              alignItems: "center",
            }}
          >
            <TouchableOpacity
               onPress={(props) => props.navigation.navigate("CoursesPlaylistScreen")}
              style={{
                flexDirection: …