Cannot resolve symbol 'unity_playe

这些错误信息是关于Qt网络库中的SSL套接字的问题。无法解决函数sk_num、sk_value和sk_new_null的符号。这通常是由于缺少链接到OpenSSL库的问题引起的。要解决这个问题，您可以尝试以下方法：
1. 确保您的项目正确链接了OpenSSL库。在Qt项目中，您可以在.pro文件中添加类似于"LIBS += -lssl -lcrypto"的语句来链接OpenSSL库。
2. 确保您的系统上安装了OpenSSL库，并且路径设置正确。您可以在终端中运行"openssl version"命令来检查OpenSSL是否已正确安装并设置路径。
3. 如果您正在使用Qt Creator，请确保正确配置了Kits和Qt版本。有时候，Qt Creator可能会出现错误配置的情况，导致无法解析符号。
4. 如果您使用的是动态链接的Qt库，而不是静态链接的，您还需要确保正确设置了运行时环境变量，以便找到OpenSSL库。

相关问题

Cannot resolve symbol 'ACTION_USB_STATE'

`ACTION_USB_STATE` is a constant defined in the `android.hardware.usb.UsbManager` class. It is used to broadcast USB state changes. If you are getting the error "Cannot resolve symbol 'ACTION_USB_STATE'", it means that you haven't imported the necessary class or there might be an issue with your Android project configuration.

To resolve this issue, make sure you have the following import statement at the top of your Java file:

import android.hardware.usb.UsbManager;

Also, ensure that you have the necessary permissions declared in your AndroidManifest.xml file:

<uses-permission android:name="android.permission.USB_PERMISSION" />

If you have already done these steps and still encounter the issue, try cleaning and rebuilding your project or restarting your IDE.

Cannot resolve symbol 'WRITE_EXTERNAL_STORAGE'

This error typically occurs when you are trying to use the WRITE_EXTERNAL_STORAGE permission in your Android application but have not declared it in the AndroidManifest.xml file.

To resolve this error, add the following line of code to your AndroidManifest.xml file:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

This will declare the WRITE_EXTERNAL_STORAGE permission and allow your application to write to external storage.