android - Unity Gear VR 在构建时出错

Question

我正在尝试设置和构建https://resources.samsungdevelopers.com/Gear_VR/030_Create_VR_App_or_Game_Using_a_Game_Engine/Exercise_2%3A_Create_a_Splash_Screen/Step_7%3A_Build_and_Run_the_Application

当我尝试构建应用程序时，它会引发以下错误： Assets/Workshop/Scr​​ipts/TextureLoader.cs(114,31): error CS1105: `TextureLoader.GetFilesWithExtensions(this DirectoryInfo, params string[])': Extension methods must be声明为静态

// Gets the list of files in the directory by extention and filters for our specified ones (images)
public IEnumerable<FileInfo> GetFilesWithExtensions (this DirectoryInfo dir, params string[] extensions) {
    IEnumerable<FileInfo> files = dir.GetFiles();
    return files.Where(f => extensions.Contains(f.Extension));
}

public bool isFinishedLoadingFirstTexture() {
    return mFinishedFirstTexture;
}

我已经将其更改为标题中的公共静态类。

Answer 1

静态类对方法没有多大作用。您需要使您的方法静态才能使扩展工作！

public static IEnumerable<FileInfo> GetFilesWithExtensions (this DirectoryInfo dir, params string[] extensions) {
    IEnumerable<FileInfo> files = dir.GetFiles();
    return files.Where(f => extensions.Contains(f.Extension));
}

如果您需要另一个示例，我在这里写了一个扩展方法！

Answer 2

我为了做一个扩展方法，类必须是publicand static。

功能必须是public和static太。你错过了这部分。

public static class TextureLoader
{
    public static IEnumerable<FileInfo> GetFilesWithExtensions(this DirectoryInfo dir, params string[] extensions)
    {
        IEnumerable<FileInfo> files = dir.GetFiles();
        return files.Where(f => extensions.Contains(f.Extension));
    }
}

Answer 3

这样修改你的代码，错误就会消失

private IEnumerable<FileInfo> GetFilesWithExtensions(DirectoryInfo dir, string[] extensions)
{
    IEnumerable<FileInfo> files = dir.GetFiles();
    return files.Where(f => extensions.Contains(f.Extension));
}